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1Valid-License-Identifier: GPL-2.0
2Valid-License-Identifier: GPL-2.0-only
3Valid-License-Identifier: GPL-2.0+
4Valid-License-Identifier: GPL-2.0-or-later
5SPDX-URL: https://spdx.org/licenses/GPL-2.0.html
6Usage-Guide:
7  To use this license in source code, put one of the following SPDX
8  tag/value pairs into a comment according to the placement
9  guidelines in the licensing rules documentation.
10  For 'GNU General Public License (GPL) version 2 only' use:
11    SPDX-License-Identifier: GPL-2.0
12  or
13    SPDX-License-Identifier: GPL-2.0-only
14  For 'GNU General Public License (GPL) version 2 or any later version' use:
15    SPDX-License-Identifier: GPL-2.0+
16  or
17    SPDX-License-Identifier: GPL-2.0-or-later
18License-Text:
19
20		    GNU GENERAL PUBLIC LICENSE
21		       Version 2, June 1991
22
23 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
24                       51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
25 Everyone is permitted to copy and distribute verbatim copies
26 of this license document, but changing it is not allowed.
27
28			    Preamble
29
30  The licenses for most software are designed to take away your
31freedom to share and change it.  By contrast, the GNU General Public
32License is intended to guarantee your freedom to share and change free
33software--to make sure the software is free for all its users.  This
34General Public License applies to most of the Free Software
35Foundation's software and to any other program whose authors commit to
36using it.  (Some other Free Software Foundation software is covered by
37the GNU Library General Public License instead.)  You can apply it to
38your programs, too.
39
40  When we speak of free software, we are referring to freedom, not
41price.  Our General Public Licenses are designed to make sure that you
42have the freedom to distribute copies of free software (and charge for
43this service if you wish), that you receive source code or can get it
44if you want it, that you can change the software or use pieces of it
45in new free programs; and that you know you can do these things.
46
47  To protect your rights, we need to make restrictions that forbid
48anyone to deny you these rights or to ask you to surrender the rights.
49These restrictions translate to certain responsibilities for you if you
50distribute copies of the software, or if you modify it.
51
52  For example, if you distribute copies of such a program, whether
53gratis or for a fee, you must give the recipients all the rights that
54you have.  You must make sure that they, too, receive or can get the
55source code.  And you must show them these terms so they know their
56rights.
57
58  We protect your rights with two steps: (1) copyright the software, and
59(2) offer you this license which gives you legal permission to copy,
60distribute and/or modify the software.
61
62  Also, for each author's protection and ours, we want to make certain
63that everyone understands that there is no warranty for this free
64software.  If the software is modified by someone else and passed on, we
65want its recipients to know that what they have is not the original, so
66that any problems introduced by others will not reflect on the original
67authors' reputations.
68
69  Finally, any free program is threatened constantly by software
70patents.  We wish to avoid the danger that redistributors of a free
71program will individually obtain patent licenses, in effect making the
72program proprietary.  To prevent this, we have made it clear that any
73patent must be licensed for everyone's free use or not licensed at all.
74
75  The precise terms and conditions for copying, distribution and
76modification follow.
77
78		    GNU GENERAL PUBLIC LICENSE
79   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
80
81  0. This License applies to any program or other work which contains
82a notice placed by the copyright holder saying it may be distributed
83under the terms of this General Public License.  The "Program", below,
84refers to any such program or work, and a "work based on the Program"
85means either the Program or any derivative work under copyright law:
86that is to say, a work containing the Program or a portion of it,
87either verbatim or with modifications and/or translated into another
88language.  (Hereinafter, translation is included without limitation in
89the term "modification".)  Each licensee is addressed as "you".
90
91Activities other than copying, distribution and modification are not
92covered by this License; they are outside its scope.  The act of
93running the Program is not restricted, and the output from the Program
94is covered only if its contents constitute a work based on the
95Program (independent of having been made by running the Program).
96Whether that is true depends on what the Program does.
97
98  1. You may copy and distribute verbatim copies of the Program's
99source code as you receive it, in any medium, provided that you
100conspicuously and appropriately publish on each copy an appropriate
101copyright notice and disclaimer of warranty; keep intact all the
102notices that refer to this License and to the absence of any warranty;
103and give any other recipients of the Program a copy of this License
104along with the Program.
105
106You may charge a fee for the physical act of transferring a copy, and
107you may at your option offer warranty protection in exchange for a fee.
108
109  2. You may modify your copy or copies of the Program or any portion
110of it, thus forming a work based on the Program, and copy and
111distribute such modifications or work under the terms of Section 1
112above, provided that you also meet all of these conditions:
113
114    a) You must cause the modified files to carry prominent notices
115    stating that you changed the files and the date of any change.
116
117    b) You must cause any work that you distribute or publish, that in
118    whole or in part contains or is derived from the Program or any
119    part thereof, to be licensed as a whole at no charge to all third
120    parties under the terms of this License.
121
122    c) If the modified program normally reads commands interactively
123    when run, you must cause it, when started running for such
124    interactive use in the most ordinary way, to print or display an
125    announcement including an appropriate copyright notice and a
126    notice that there is no warranty (or else, saying that you provide
127    a warranty) and that users may redistribute the program under
128    these conditions, and telling the user how to view a copy of this
129    License.  (Exception: if the Program itself is interactive but
130    does not normally print such an announcement, your work based on
131    the Program is not required to print an announcement.)
132
133These requirements apply to the modified work as a whole.  If
134identifiable sections of that work are not derived from the Program,
135and can be reasonably considered independent and separate works in
136themselves, then this License, and its terms, do not apply to those
137sections when you distribute them as separate works.  But when you
138distribute the same sections as part of a whole which is a work based
139on the Program, the distribution of the whole must be on the terms of
140this License, whose permissions for other licensees extend to the
141entire whole, and thus to each and every part regardless of who wrote it.
142
143Thus, it is not the intent of this section to claim rights or contest
144your rights to work written entirely by you; rather, the intent is to
145exercise the right to control the distribution of derivative or
146collective works based on the Program.
147
148In addition, mere aggregation of another work not based on the Program
149with the Program (or with a work based on the Program) on a volume of
150a storage or distribution medium does not bring the other work under
151the scope of this License.
152
153  3. You may copy and distribute the Program (or a work based on it,
154under Section 2) in object code or executable form under the terms of
155Sections 1 and 2 above provided that you also do one of the following:
156
157    a) Accompany it with the complete corresponding machine-readable
158    source code, which must be distributed under the terms of Sections
159    1 and 2 above on a medium customarily used for software interchange; or,
160
161    b) Accompany it with a written offer, valid for at least three
162    years, to give any third party, for a charge no more than your
163    cost of physically performing source distribution, a complete
164    machine-readable copy of the corresponding source code, to be
165    distributed under the terms of Sections 1 and 2 above on a medium
166    customarily used for software interchange; or,
167
168    c) Accompany it with the information you received as to the offer
169    to distribute corresponding source code.  (This alternative is
170    allowed only for noncommercial distribution and only if you
171    received the program in object code or executable form with such
172    an offer, in accord with Subsection b above.)
173
174The source code for a work means the preferred form of the work for
175making modifications to it.  For an executable work, complete source
176code means all the source code for all modules it contains, plus any
177associated interface definition files, plus the scripts used to
178control compilation and installation of the executable.  However, as a
179special exception, the source code distributed need not include
180anything that is normally distributed (in either source or binary
181form) with the major components (compiler, kernel, and so on) of the
182operating system on which the executable runs, unless that component
183itself accompanies the executable.
184
185If distribution of executable or object code is made by offering
186access to copy from a designated place, then offering equivalent
187access to copy the source code from the same place counts as
188distribution of the source code, even though third parties are not
189compelled to copy the source along with the object code.
190
191  4. You may not copy, modify, sublicense, or distribute the Program
192except as expressly provided under this License.  Any attempt
193otherwise to copy, modify, sublicense or distribute the Program is
194void, and will automatically terminate your rights under this License.
195However, parties who have received copies, or rights, from you under
196this License will not have their licenses terminated so long as such
197parties remain in full compliance.
198
199  5. You are not required to accept this License, since you have not
200signed it.  However, nothing else grants you permission to modify or
201distribute the Program or its derivative works.  These actions are
202prohibited by law if you do not accept this License.  Therefore, by
203modifying or distributing the Program (or any work based on the
204Program), you indicate your acceptance of this License to do so, and
205all its terms and conditions for copying, distributing or modifying
206the Program or works based on it.
207
208  6. Each time you redistribute the Program (or any work based on the
209Program), the recipient automatically receives a license from the
210original licensor to copy, distribute or modify the Program subject to
211these terms and conditions.  You may not impose any further
212restrictions on the recipients' exercise of the rights granted herein.
213You are not responsible for enforcing compliance by third parties to
214this License.
215
216  7. If, as a consequence of a court judgment or allegation of patent
217infringement or for any other reason (not limited to patent issues),
218conditions are imposed on you (whether by court order, agreement or
219otherwise) that contradict the conditions of this License, they do not
220excuse you from the conditions of this License.  If you cannot
221distribute so as to satisfy simultaneously your obligations under this
222License and any other pertinent obligations, then as a consequence you
223may not distribute the Program at all.  For example, if a patent
224license would not permit royalty-free redistribution of the Program by
225all those who receive copies directly or indirectly through you, then
226the only way you could satisfy both it and this License would be to
227refrain entirely from distribution of the Program.
228
229If any portion of this section is held invalid or unenforceable under
230any particular circumstance, the balance of the section is intended to
231apply and the section as a whole is intended to apply in other
232circumstances.
233
234It is not the purpose of this section to induce you to infringe any
235patents or other property right claims or to contest validity of any
236such claims; this section has the sole purpose of protecting the
237integrity of the free software distribution system, which is
238implemented by public license practices.  Many people have made
239generous contributions to the wide range of software distributed
240through that system in reliance on consistent application of that
241system; it is up to the author/donor to decide if he or she is willing
242to distribute software through any other system and a licensee cannot
243impose that choice.
244
245This section is intended to make thoroughly clear what is believed to
246be a consequence of the rest of this License.
247
248  8. If the distribution and/or use of the Program is restricted in
249certain countries either by patents or by copyrighted interfaces, the
250original copyright holder who places the Program under this License
251may add an explicit geographical distribution limitation excluding
252those countries, so that distribution is permitted only in or among
253countries not thus excluded.  In such case, this License incorporates
254the limitation as if written in the body of this License.
255
256  9. The Free Software Foundation may publish revised and/or new versions
257of the General Public License from time to time.  Such new versions will
258be similar in spirit to the present version, but may differ in detail to
259address new problems or concerns.
260
261Each version is given a distinguishing version number.  If the Program
262specifies a version number of this License which applies to it and "any
263later version", you have the option of following the terms and conditions
264either of that version or of any later version published by the Free
265Software Foundation.  If the Program does not specify a version number of
266this License, you may choose any version ever published by the Free Software
267Foundation.
268
269  10. If you wish to incorporate parts of the Program into other free
270programs whose distribution conditions are different, write to the author
271to ask for permission.  For software which is copyrighted by the Free
272Software Foundation, write to the Free Software Foundation; we sometimes
273make exceptions for this.  Our decision will be guided by the two goals
274of preserving the free status of all derivatives of our free software and
275of promoting the sharing and reuse of software generally.
276
277			    NO WARRANTY
278
279  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
280FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
281OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
282PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
283OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
284MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
285TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
286PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
287REPAIR OR CORRECTION.
288
289  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
290WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
291REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
292INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
293OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
294TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
295YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
296PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
297POSSIBILITY OF SUCH DAMAGES.
298
299		     END OF TERMS AND CONDITIONS
300
301	    How to Apply These Terms to Your New Programs
302
303  If you develop a new program, and you want it to be of the greatest
304possible use to the public, the best way to achieve this is to make it
305free software which everyone can redistribute and change under these terms.
306
307  To do so, attach the following notices to the program.  It is safest
308to attach them to the start of each source file to most effectively
309convey the exclusion of warranty; and each file should have at least
310the "copyright" line and a pointer to where the full notice is found.
311
312    <one line to give the program's name and a brief idea of what it does.>
313    Copyright (C) <year>  <name of author>
314
315    This program is free software; you can redistribute it and/or modify
316    it under the terms of the GNU General Public License as published by
317    the Free Software Foundation; either version 2 of the License, or
318    (at your option) any later version.
319
320    This program is distributed in the hope that it will be useful,
321    but WITHOUT ANY WARRANTY; without even the implied warranty of
322    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
323    GNU General Public License for more details.
324
325    You should have received a copy of the GNU General Public License
326    along with this program; if not, write to the Free Software
327    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
328
329
330Also add information on how to contact you by electronic and paper mail.
331
332If the program is interactive, make it output a short notice like this
333when it starts in an interactive mode:
334
335    Gnomovision version 69, Copyright (C) year name of author
336    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
337    This is free software, and you are welcome to redistribute it
338    under certain conditions; type `show c' for details.
339
340The hypothetical commands `show w' and `show c' should show the appropriate
341parts of the General Public License.  Of course, the commands you use may
342be called something other than `show w' and `show c'; they could even be
343mouse-clicks or menu items--whatever suits your program.
344
345You should also get your employer (if you work as a programmer) or your
346school, if any, to sign a "copyright disclaimer" for the program, if
347necessary.  Here is a sample; alter the names:
348
349  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
350  `Gnomovision' (which makes passes at compilers) written by James Hacker.
351
352  <signature of Ty Coon>, 1 April 1989
353  Ty Coon, President of Vice
354
355This General Public License does not permit incorporating your program into
356proprietary programs.  If your program is a subroutine library, you may
357consider it more useful to permit linking proprietary applications with the
358library.  If this is what you want to do, use the GNU Library General
359Public License instead of this License.
360
361-------------------------------------------------------------------------
362
363Valid-License-Identifier: LGPL-2.1
364Valid-License-Identifier: LGPL-2.1+
365SPDX-URL: https://spdx.org/licenses/LGPL-2.1.html
366Usage-Guide:
367  To use this license in source code, put one of the following SPDX
368  tag/value pairs into a comment according to the placement
369  guidelines in the licensing rules documentation.
370  For 'GNU Lesser General Public License (LGPL) version 2.1 only' use:
371    SPDX-License-Identifier: LGPL-2.1
372  For 'GNU Lesser General Public License (LGPL) version 2.1 or any later
373  version' use:
374    SPDX-License-Identifier: LGPL-2.1+
375License-Text:
376
377GNU LESSER GENERAL PUBLIC LICENSE
378Version 2.1, February 1999
379
380Copyright (C) 1991, 1999 Free Software Foundation, Inc.
38151 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
382
383Everyone is permitted to copy and distribute verbatim copies of this
384license document, but changing it is not allowed.
385
386[This is the first released version of the Lesser GPL. It also counts as
387the successor of the GNU Library Public License, version 2, hence the
388version number 2.1.]
389
390Preamble
391
392The licenses for most software are designed to take away your freedom to
393share and change it. By contrast, the GNU General Public Licenses are
394intended to guarantee your freedom to share and change free software--to
395make sure the software is free for all its users.
396
397This license, the Lesser General Public License, applies to some specially
398designated software packages--typically libraries--of the Free Software
399Foundation and other authors who decide to use it. You can use it too, but
400we suggest you first think carefully about whether this license or the
401ordinary General Public License is the better strategy to use in any
402particular case, based on the explanations below.
403
404When we speak of free software, we are referring to freedom of use, not
405price. Our General Public Licenses are designed to make sure that you have
406the freedom to distribute copies of free software (and charge for this
407service if you wish); that you receive source code or can get it if you
408want it; that you can change the software and use pieces of it in new free
409programs; and that you are informed that you can do these things.
410
411To protect your rights, we need to make restrictions that forbid
412distributors to deny you these rights or to ask you to surrender these
413rights. These restrictions translate to certain responsibilities for you if
414you distribute copies of the library or if you modify it.
415
416For example, if you distribute copies of the library, whether gratis or for
417a fee, you must give the recipients all the rights that we gave you. You
418must make sure that they, too, receive or can get the source code. If you
419link other code with the library, you must provide complete object files to
420the recipients, so that they can relink them with the library after making
421changes to the library and recompiling it. And you must show them these
422terms so they know their rights.
423
424We protect your rights with a two-step method: (1) we copyright the
425library, and (2) we offer you this license, which gives you legal
426permission to copy, distribute and/or modify the library.
427
428To protect each distributor, we want to make it very clear that there is no
429warranty for the free library. Also, if the library is modified by someone
430else and passed on, the recipients should know that what they have is not
431the original version, so that the original author's reputation will not be
432affected by problems that might be introduced by others.
433
434Finally, software patents pose a constant threat to the existence of any
435free program. We wish to make sure that a company cannot effectively
436restrict the users of a free program by obtaining a restrictive license
437from a patent holder. Therefore, we insist that any patent license obtained
438for a version of the library must be consistent with the full freedom of
439use specified in this license.
440
441Most GNU software, including some libraries, is covered by the ordinary GNU
442General Public License. This license, the GNU Lesser General Public
443License, applies to certain designated libraries, and is quite different
444from the ordinary General Public License. We use this license for certain
445libraries in order to permit linking those libraries into non-free
446programs.
447
448When a program is linked with a library, whether statically or using a
449shared library, the combination of the two is legally speaking a combined
450work, a derivative of the original library. The ordinary General Public
451License therefore permits such linking only if the entire combination fits
452its criteria of freedom. The Lesser General Public License permits more lax
453criteria for linking other code with the library.
454
455We call this license the "Lesser" General Public License because it does
456Less to protect the user's freedom than the ordinary General Public
457License. It also provides other free software developers Less of an
458advantage over competing non-free programs. These disadvantages are the
459reason we use the ordinary General Public License for many
460libraries. However, the Lesser license provides advantages in certain
461special circumstances.
462
463For example, on rare occasions, there may be a special need to encourage
464the widest possible use of a certain library, so that it becomes a de-facto
465standard. To achieve this, non-free programs must be allowed to use the
466library. A more frequent case is that a free library does the same job as
467widely used non-free libraries. In this case, there is little to gain by
468limiting the free library to free software only, so we use the Lesser
469General Public License.
470
471In other cases, permission to use a particular library in non-free programs
472enables a greater number of people to use a large body of free
473software. For example, permission to use the GNU C Library in non-free
474programs enables many more people to use the whole GNU operating system, as
475well as its variant, the GNU/Linux operating system.
476
477Although the Lesser General Public License is Less protective of the users'
478freedom, it does ensure that the user of a program that is linked with the
479Library has the freedom and the wherewithal to run that program using a
480modified version of the Library.
481
482The precise terms and conditions for copying, distribution and modification
483follow. Pay close attention to the difference between a "work based on the
484library" and a "work that uses the library". The former contains code
485derived from the library, whereas the latter must be combined with the
486library in order to run.
487
488TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
489
4900. This License Agreement applies to any software library or other program
491   which contains a notice placed by the copyright holder or other
492   authorized party saying it may be distributed under the terms of this
493   Lesser General Public License (also called "this License"). Each
494   licensee is addressed as "you".
495
496   A "library" means a collection of software functions and/or data
497   prepared so as to be conveniently linked with application programs
498   (which use some of those functions and data) to form executables.
499
500   The "Library", below, refers to any such software library or work which
501   has been distributed under these terms. A "work based on the Library"
502   means either the Library or any derivative work under copyright law:
503   that is to say, a work containing the Library or a portion of it, either
504   verbatim or with modifications and/or translated straightforwardly into
505   another language. (Hereinafter, translation is included without
506   limitation in the term "modification".)
507
508   "Source code" for a work means the preferred form of the work for making
509   modifications to it. For a library, complete source code means all the
510   source code for all modules it contains, plus any associated interface
511   definition files, plus the scripts used to control compilation and
512   installation of the library.
513
514    Activities other than copying, distribution and modification are not
515    covered by this License; they are outside its scope. The act of running
516    a program using the Library is not restricted, and output from such a
517    program is covered only if its contents constitute a work based on the
518    Library (independent of the use of the Library in a tool for writing
519    it). Whether that is true depends on what the Library does and what the
520    program that uses the Library does.
521
5221. You may copy and distribute verbatim copies of the Library's complete
523   source code as you receive it, in any medium, provided that you
524   conspicuously and appropriately publish on each copy an appropriate
525   copyright notice and disclaimer of warranty; keep intact all the notices
526   that refer to this License and to the absence of any warranty; and
527   distribute a copy of this License along with the Library.
528
529   You may charge a fee for the physical act of transferring a copy, and
530   you may at your option offer warranty protection in exchange for a fee.
531
5322. You may modify your copy or copies of the Library or any portion of it,
533   thus forming a work based on the Library, and copy and distribute such
534   modifications or work under the terms of Section 1 above, provided that
535   you also meet all of these conditions:
536
537   a) The modified work must itself be a software library.
538
539   b) You must cause the files modified to carry prominent notices stating
540      that you changed the files and the date of any change.
541
542   c) You must cause the whole of the work to be licensed at no charge to
543      all third parties under the terms of this License.
544
545   d) If a facility in the modified Library refers to a function or a table
546      of data to be supplied by an application program that uses the
547      facility, other than as an argument passed when the facility is
548      invoked, then you must make a good faith effort to ensure that, in
549      the event an application does not supply such function or table, the
550      facility still operates, and performs whatever part of its purpose
551      remains meaningful.
552
553   (For example, a function in a library to compute square roots has a
554    purpose that is entirely well-defined independent of the
555    application. Therefore, Subsection 2d requires that any
556    application-supplied function or table used by this function must be
557    optional: if the application does not supply it, the square root
558    function must still compute square roots.)
559
560   These requirements apply to the modified work as a whole. If
561   identifiable sections of that work are not derived from the Library, and
562   can be reasonably considered independent and separate works in
563   themselves, then this License, and its terms, do not apply to those
564   sections when you distribute them as separate works. But when you
565   distribute the same sections as part of a whole which is a work based on
566   the Library, the distribution of the whole must be on the terms of this
567   License, whose permissions for other licensees extend to the entire
568   whole, and thus to each and every part regardless of who wrote it.
569
570   Thus, it is not the intent of this section to claim rights or contest
571   your rights to work written entirely by you; rather, the intent is to
572   exercise the right to control the distribution of derivative or
573   collective works based on the Library.
574
575   In addition, mere aggregation of another work not based on the Library
576   with the Library (or with a work based on the Library) on a volume of a
577   storage or distribution medium does not bring the other work under the
578   scope of this License.
579
5803. You may opt to apply the terms of the ordinary GNU General Public
581   License instead of this License to a given copy of the Library. To do
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823
824How to Apply These Terms to Your New Libraries
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863signature of Ty Coon, 1 April 1990
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865That's all there is to it!
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867-------------------------------------------------------------------------
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869                    GNU GENERAL PUBLIC LICENSE
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1153    Corresponding Source, you remain obligated to ensure that it is
1154    available for as long as needed to satisfy these requirements.
1155
1156    e) Convey the object code using peer-to-peer transmission, provided
1157    you inform other peers where the object code and Corresponding
1158    Source of the work are being offered to the general public at no
1159    charge under subsection 6d.
1160
1161  A separable portion of the object code, whose source code is excluded
1162from the Corresponding Source as a System Library, need not be
1163included in conveying the object code work.
1164
1165  A "User Product" is either (1) a "consumer product", which means any
1166tangible personal property which is normally used for personal, family,
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1168into a dwelling.  In determining whether a product is a consumer product,
1169doubtful cases shall be resolved in favor of coverage.  For a particular
1170product received by a particular user, "normally used" refers to a
1171typical or common use of that class of product, regardless of the status
1172of the particular user or of the way in which the particular user
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1174is a consumer product regardless of whether the product has substantial
1175commercial, industrial or non-consumer uses, unless such uses represent
1176the only significant mode of use of the product.
1177
1178  "Installation Information" for a User Product means any methods,
1179procedures, authorization keys, or other information required to install
1180and execute modified versions of a covered work in that User Product from
1181a modified version of its Corresponding Source.  The information must
1182suffice to ensure that the continued functioning of the modified object
1183code is in no case prevented or interfered with solely because
1184modification has been made.
1185
1186  If you convey an object code work under this section in, or with, or
1187specifically for use in, a User Product, and the conveying occurs as
1188part of a transaction in which the right of possession and use of the
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1190fixed term (regardless of how the transaction is characterized), the
1191Corresponding Source conveyed under this section must be accompanied
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1193if neither you nor any third party retains the ability to install
1194modified object code on the User Product (for example, the work has
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1196
1197  The requirement to provide Installation Information does not include a
1198requirement to continue to provide support service, warranty, or updates
1199for a work that has been modified or installed by the recipient, or for
1200the User Product in which it has been modified or installed.  Access to a
1201network may be denied when the modification itself materially and
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1203protocols for communication across the network.
1204
1205  Corresponding Source conveyed, and Installation Information provided,
1206in accord with this section must be in a format that is publicly
1207documented (and with an implementation available to the public in
1208source code form), and must require no special password or key for
1209unpacking, reading or copying.
1210
1211  7. Additional Terms.
1212
1213  "Additional permissions" are terms that supplement the terms of this
1214License by making exceptions from one or more of its conditions.
1215Additional permissions that are applicable to the entire Program shall
1216be treated as though they were included in this License, to the extent
1217that they are valid under applicable law.  If additional permissions
1218apply only to part of the Program, that part may be used separately
1219under those permissions, but the entire Program remains governed by
1220this License without regard to the additional permissions.
1221
1222  When you convey a copy of a covered work, you may at your option
1223remove any additional permissions from that copy, or from any part of
1224it.  (Additional permissions may be written to require their own
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1226additional permissions on material, added by you to a covered work,
1227for which you have or can give appropriate copyright permission.
1228
1229  Notwithstanding any other provision of this License, for material you
1230add to a covered work, you may (if authorized by the copyright holders of
1231that material) supplement the terms of this License with terms:
1232
1233    a) Disclaiming warranty or limiting liability differently from the
1234    terms of sections 15 and 16 of this License; or
1235
1236    b) Requiring preservation of specified reasonable legal notices or
1237    author attributions in that material or in the Appropriate Legal
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1239
1240    c) Prohibiting misrepresentation of the origin of that material, or
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1243
1244    d) Limiting the use for publicity purposes of names of licensors or
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1246
1247    e) Declining to grant rights under trademark law for use of some
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1249
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1255
1256  All other non-permissive additional terms are considered "further
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1258received it, or any part of it, contains a notice stating that it is
1259governed by this License along with a term that is a further
1260restriction, you may remove that term.  If a license document contains
1261a further restriction but permits relicensing or conveying under this
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1265
1266  If you add terms to a covered work in accord with this section, you
1267must place, in the relevant source files, a statement of the
1268additional terms that apply to those files, or a notice indicating
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1270
1271  Additional terms, permissive or non-permissive, may be stated in the
1272form of a separately written license, or stated as exceptions;
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1274
1275  8. Termination.
1276
1277  You may not propagate or modify a covered work except as expressly
1278provided under this License.  Any attempt otherwise to propagate or
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1280this License (including any patent licenses granted under the third
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1282
1283  However, if you cease all violation of this License, then your
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1286finally terminates your license, and (b) permanently, if the copyright
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1289
1290  Moreover, your license from a particular copyright holder is
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1292violation by some reasonable means, this is the first time you have
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1296
1297  Termination of your rights under this section does not terminate the
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1301material under section 10.
1302
1303  9. Acceptance Not Required for Having Copies.
1304
1305  You are not required to accept this License in order to receive or
1306run a copy of the Program.  Ancillary propagation of a covered work
1307occurring solely as a consequence of using peer-to-peer transmission
1308to receive a copy likewise does not require acceptance.  However,
1309nothing other than this License grants you permission to propagate or
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1312covered work, you indicate your acceptance of this License to do so.
1313
1314  10. Automatic Licensing of Downstream Recipients.
1315
1316  Each time you convey a covered work, the recipient automatically
1317receives a license from the original licensors, to run, modify and
1318propagate that work, subject to this License.  You are not responsible
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1320
1321  An "entity transaction" is a transaction transferring control of an
1322organization, or substantially all assets of one, or subdividing an
1323organization, or merging organizations.  If propagation of a covered
1324work results from an entity transaction, each party to that
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1327give under the previous paragraph, plus a right to possession of the
1328Corresponding Source of the work from the predecessor in interest, if
1329the predecessor has it or can get it with reasonable efforts.
1330
1331  You may not impose any further restrictions on the exercise of the
1332rights granted or affirmed under this License.  For example, you may
1333not impose a license fee, royalty, or other charge for exercise of
1334rights granted under this License, and you may not initiate litigation
1335(including a cross-claim or counterclaim in a lawsuit) alleging that
1336any patent claim is infringed by making, using, selling, offering for
1337sale, or importing the Program or any portion of it.
1338
1339  11. Patents.
1340
1341  A "contributor" is a copyright holder who authorizes use under this
1342License of the Program or a work on which the Program is based.  The
1343work thus licensed is called the contributor's "contributor version".
1344
1345  A contributor's "essential patent claims" are all patent claims
1346owned or controlled by the contributor, whether already acquired or
1347hereafter acquired, that would be infringed by some manner, permitted
1348by this License, of making, using, or selling its contributor version,
1349but do not include claims that would be infringed only as a
1350consequence of further modification of the contributor version.  For
1351purposes of this definition, "control" includes the right to grant
1352patent sublicenses in a manner consistent with the requirements of
1353this License.
1354
1355  Each contributor grants you a non-exclusive, worldwide, royalty-free
1356patent license under the contributor's essential patent claims, to
1357make, use, sell, offer for sale, import and otherwise run, modify and
1358propagate the contents of its contributor version.
1359
1360  In the following three paragraphs, a "patent license" is any express
1361agreement or commitment, however denominated, not to enforce a patent
1362(such as an express permission to practice a patent or covenant not to
1363sue for patent infringement).  To "grant" such a patent license to a
1364party means to make such an agreement or commitment not to enforce a
1365patent against the party.
1366
1367  If you convey a covered work, knowingly relying on a patent license,
1368and the Corresponding Source of the work is not available for anyone
1369to copy, free of charge and under the terms of this License, through a
1370publicly available network server or other readily accessible means,
1371then you must either (1) cause the Corresponding Source to be so
1372available, or (2) arrange to deprive yourself of the benefit of the
1373patent license for this particular work, or (3) arrange, in a manner
1374consistent with the requirements of this License, to extend the patent
1375license to downstream recipients.  "Knowingly relying" means you have
1376actual knowledge that, but for the patent license, your conveying the
1377covered work in a country, or your recipient's use of the covered work
1378in a country, would infringe one or more identifiable patents in that
1379country that you have reason to believe are valid.
1380
1381  If, pursuant to or in connection with a single transaction or
1382arrangement, you convey, or propagate by procuring conveyance of, a
1383covered work, and grant a patent license to some of the parties
1384receiving the covered work authorizing them to use, propagate, modify
1385or convey a specific copy of the covered work, then the patent license
1386you grant is automatically extended to all recipients of the covered
1387work and works based on it.
1388
1389  A patent license is "discriminatory" if it does not include within
1390the scope of its coverage, prohibits the exercise of, or is
1391conditioned on the non-exercise of one or more of the rights that are
1392specifically granted under this License.  You may not convey a covered
1393work if you are a party to an arrangement with a third party that is
1394in the business of distributing software, under which you make payment
1395to the third party based on the extent of your activity of conveying
1396the work, and under which the third party grants, to any of the
1397parties who would receive the covered work from you, a discriminatory
1398patent license (a) in connection with copies of the covered work
1399conveyed by you (or copies made from those copies), or (b) primarily
1400for and in connection with specific products or compilations that
1401contain the covered work, unless you entered into that arrangement,
1402or that patent license was granted, prior to 28 March 2007.
1403
1404  Nothing in this License shall be construed as excluding or limiting
1405any implied license or other defenses to infringement that may
1406otherwise be available to you under applicable patent law.
1407
1408  12. No Surrender of Others' Freedom.
1409
1410  If conditions are imposed on you (whether by court order, agreement or
1411otherwise) that contradict the conditions of this License, they do not
1412excuse you from the conditions of this License.  If you cannot convey a
1413covered work so as to satisfy simultaneously your obligations under this
1414License and any other pertinent obligations, then as a consequence you may
1415not convey it at all.  For example, if you agree to terms that obligate you
1416to collect a royalty for further conveying from those to whom you convey
1417the Program, the only way you could satisfy both those terms and this
1418License would be to refrain entirely from conveying the Program.
1419
1420  13. Use with the GNU Affero General Public License.
1421
1422  Notwithstanding any other provision of this License, you have
1423permission to link or combine any covered work with a work licensed
1424under version 3 of the GNU Affero General Public License into a single
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1426License will continue to apply to the part which is the covered work,
1427but the special requirements of the GNU Affero General Public License,
1428section 13, concerning interaction through a network will apply to the
1429combination as such.
1430
1431  14. Revised Versions of this License.
1432
1433  The Free Software Foundation may publish revised and/or new versions of
1434the GNU General Public License from time to time.  Such new versions will
1435be similar in spirit to the present version, but may differ in detail to
1436address new problems or concerns.
1437
1438  Each version is given a distinguishing version number.  If the
1439Program specifies that a certain numbered version of the GNU General
1440Public License "or any later version" applies to it, you have the
1441option of following the terms and conditions either of that numbered
1442version or of any later version published by the Free Software
1443Foundation.  If the Program does not specify a version number of the
1444GNU General Public License, you may choose any version ever published
1445by the Free Software Foundation.
1446
1447  If the Program specifies that a proxy can decide which future
1448versions of the GNU General Public License can be used, that proxy's
1449public statement of acceptance of a version permanently authorizes you
1450to choose that version for the Program.
1451
1452  Later license versions may give you additional or different
1453permissions.  However, no additional obligations are imposed on any
1454author or copyright holder as a result of your choosing to follow a
1455later version.
1456
1457  15. Disclaimer of Warranty.
1458
1459  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
1460APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
1461HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
1462OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
1463THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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1465IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
1466ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
1467
1468  16. Limitation of Liability.
1469
1470  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
1471WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
1472THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
1473GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
1474USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
1475DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
1476PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
1477EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
1478SUCH DAMAGES.
1479
1480  17. Interpretation of Sections 15 and 16.
1481
1482  If the disclaimer of warranty and limitation of liability provided
1483above cannot be given local legal effect according to their terms,
1484reviewing courts shall apply local law that most closely approximates
1485an absolute waiver of all civil liability in connection with the
1486Program, unless a warranty or assumption of liability accompanies a
1487copy of the Program in return for a fee.
1488
1489Bison Exception
1490
1491As a special exception, you may create a larger work that contains part or all
1492of the Bison parser skeleton and distribute that work under terms of your
1493choice, so long as that work isn't itself a parser generator using the skeleton
1494or a modified version thereof as a parser skeleton.  Alternatively, if you
1495modify or redistribute the parser skeleton itself, you may (at your option)
1496remove this special exception, which will cause the skeleton and the resulting
1497Bison output files to be licensed under the GNU General Public License without
1498this special exception.
1499
1500This special exception was added by the Free Software Foundation in version
15012.2 of Bison.
1502
1503                     END OF TERMS AND CONDITIONS
1504