curl and libcurl 8.4.1

 Public curl releases:         253
 Command line options:         258
 curl_easy_setopt() options:   303
 Public functions in libcurl:  93
 Contributors:                 3001

This release includes the following changes:


This release includes the following bugfixes:

 o build: add `src/.checksrc` to source tarball [1]
 o CI: add autotools, out-of-tree, debug build to distro check job [14]
 o CI: ignore test 286 on Appveyor gcc 9 build [6]
 o cmake: fix `HAVE_H_ERRNO_ASSIGNABLE` detection [2]
 o cmake: fix CURL_DISABLE_GETOPTIONS [12]
 o docs: use SOURCE_DATE_EPOCH for generated manpages [16]
 o easy_lock: add a pthread_mutex_t fallback [13]
 o http2: safer invocation of populate_binsettings [8]
 o http: avoid Expect: 100-continue if Upgrade: is used [15]
 o lib: fix gcc warning in printf call [7]
 o openssl: avoid BN_num_bits() NULL pointer derefs [9]
 o quic: manage connection idle timeouts [5]
 o test613: stop showing an error on missing output file
 o tool_getparam: limit --rate to be smaller than number of ms [3]
 o tool_urlglob: make multiply() bail out on negative values [11]
 o wolfssl: require WOLFSSL_SYS_CA_CERTS for loading system CA [10]

This release includes the following known bugs:

 o see docs/KNOWN_BUGS (https://curl.se/docs/knownbugs.html)

Planned upcoming removals include:

 o support for space-separated NOPROXY patterns

 See https://curl.se/dev/deprecate.html for details

This release would not have looked like this without help, code, reports and
advice from friends like these:

  Alex Klyubin, calvin2021y on github, Dan Fandrich, Daniel Jeliński,
  Daniel Stenberg, icy17 on github, Jan Alexander Steffens, Jeroen Ooms,
  Kartatz on Github, Loïc Yhuel, Ray Satiro, Romain Geissler, Sohom Datta,
  Stefan Eissing, Torben Dury, Viktor Szakats
  (16 contributors)

References to bug reports and discussions on issues:

 [1] = https://curl.se/bug/?i=12084
 [2] = https://curl.se/bug/?i=12093
 [3] = https://curl.se/bug/?i=12116
 [5] = https://curl.se/bug/?i=12064
 [6] = https://curl.se/bug/?i=12040
 [7] = https://curl.se/bug/?i=12082
 [8] = https://curl.se/bug/?i=12101
 [9] = https://curl.se/bug/?i=12099
 [10] = https://curl.se/bug/?i=12108
 [11] = https://curl.se/bug/?i=12102
 [12] = https://curl.se/bug/?i=12091
 [13] = https://curl.se/bug/?i=12090
 [14] = https://curl.se/bug/?i=12088
 [15] = https://curl.se/bug/?i=12022
 [16] = https://curl.se/bug/?i=12092