1# Items to be removed from future curl releases 2 3If any of these deprecated features is a cause for concern for you, please 4email the 5[curl-library mailing list](https://lists.haxx.se/listinfo/curl-library) 6as soon as possible and explain to us why this is a problem for you and 7how your use case cannot be satisfied properly using a workaround. 8 9## space-separated `NOPROXY` patterns 10 11When specifying patterns/domain names for curl that should *not* go through a 12proxy, the curl tool features the `--noproxy` command line option and the 13library supports the `NO_PROXY` environment variable and the `CURLOPT_NOPROXY` 14libcurl option. 15 16They all set the same list of patterns. This list is documented to be a set of 17**comma-separated** names, but can also be provided separated with just 18space. The ability to just use spaces for this has never been documented but 19some users may still have come to rely on this. 20 21Several other tools and utilities also parse the `NO_PROXY` environment 22variable but do not consider a space to be a valid separator. Using spaces for 23separator is probably less portable and might cause more friction than commas 24do. Users should use commas for this for greater portability. 25 26curl will remove the support for space-separated names in July 2024. 27 28## past removals 29 30 - Pipelining 31 - axTLS 32 - PolarSSL 33 - NPN 34 - Support for systems without 64 bit data types 35 - NSS 36 - gskit 37 - mingw v1 38