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:                 3006

This release includes the following changes:


This release includes the following bugfixes:

 o asyn-thread: use pipe instead of socketpair for IPC when available [4]
 o build: add `src/.checksrc` to source tarball [1]
 o build: fix 'threadsafe' feature detection for older gcc [19]
 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 cmake: replace `check_library_exists_concat()` [23]
 o curl.h: on FreeBSD include sys/param.h instead of osreldate.h [21]
 o docs/libcurl: fix three minor man page format mistakes [26]
 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 multi: use pipe instead of socketpair to *wakeup() [18]
 o openssl: avoid BN_num_bits() NULL pointer derefs [9]
 o quic: manage connection idle timeouts [5]
 o socks: better buffer size checks for socks4a user and hostname [20]
 o test613: stop showing an error on missing output file
 o tests/server: add more SOCKS5 handshake error checking [27]
 o tests: Fix Windows test helper tool search & use it for handle64 [17]
 o tool_cb_wrt: fix write output for very old Windows versions [24]
 o tool_getparam: limit --rate to be smaller than number of ms [3]
 o tool_operate: fix links in ipfs errors [22]
 o tool_urlglob: fix build for old gcc versions [25]
 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, Carlos Henrique Lima Melara,
  Dan Fandrich, Daniel Jeliński, Daniel Stenberg, Faraz Fallahi,
  icy17 on github, Jan Alexander Steffens, Jeroen Ooms, Kartatz on Github,
  Loïc Yhuel, LoRd_MuldeR, Marcin Rataj, Ray Satiro, Romain Geissler,
  Samuel Henrique, sd0 on hackerone, Sohom Datta, Stefan Eissing, Torben Dury,
  Viktor Szakats
  (22 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
 [4] = https://curl.se/bug/?i=12146
 [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
 [17] = https://curl.se/bug/?i=12115
 [18] = https://curl.se/bug/?i=12142
 [19] = https://curl.se/bug/?i=12125
 [20] = https://curl.se/bug/?i=12139
 [21] = https://curl.se/bug/?i=12107
 [22] = https://curl.se/bug/?i=12133
 [23] = https://curl.se/bug/?i=11285
 [24] = https://curl.se/bug/?i=12131
 [25] = https://curl.se/bug/?i=12124
 [26] = https://curl.se/bug/?i=12126
 [27] = https://curl.se/bug/?i=12117