curl and libcurl 7.81.0

 Public curl releases:         205
 Command line options:         244
 curl_easy_setopt() options:   295
 Public functions in libcurl:  86
 Contributors:                 2536

This release includes the following changes:

 o mime: use percent-escaping for multipart form field and file names [1]

This release includes the following bugfixes:

 o azure: make the "w/o HTTP/SMTP/IMAP" build disable SSL proper [12]
 o cmake: don't set _USRDLL on a static Windows build [22]
 o configure: add -lm to configure for rustls build. [13]
 o configure: better diagnostics if hyper is built wrong [6]
 o configure: don't enable TLS when --without-* flags are used [17]
 o configure: fix runtime-lib detection on macOS [21]
 o curl.1: require "see also" for every documented option [27]
 o curl_easy_cleanup.3: remove from multi handle first [3]
 o curl_share_setopt.3: split out options into their own manpages [14]
 o docs/checksrc: Add documentation for STRERROR [18]
 o docs/cmdline-opts: do not say "protocols: all" [26]
 o gen.pl: improve example output format [29]
 o http: enable haproxy support for hyper backend [20]
 o insecure.d: expand and clarify [28]
 o multi: shut down CONNECT in Curl_detach_connnection [2]
 o netrc.d: edit the .netrc example to look nicer [24]
 o openssl: remove `RSA_METHOD_FLAG_NO_CHECK` handling if unavailable
 o openssl: remove usage of deprecated `SSL_get_peer_certificate`
 o openssl: use non-deprecated API to read key parameters
 o page-footer: add a mention of how to report bugs to the man page
 o page-footer: document more environment variables [23]
 o runtests: make the SSH library a testable feature
 o rustls: read of zero bytes might be okay [9]
 o rustls: remove comment about checking handshaking [15]
 o rustls: remove incorrect EOF check [10]
 o test302[12]: run only with the libssh2 backend [8]
 o tftp: mark protocol as not possible to do over CONNECT [25]
 o tool_operate: only set SSH related libcurl options for SSH URLs [11]
 o url.c: fix the SIGPIPE comment for Curl_close [4]
 o vtls/rustls: adapt to the updated rustls_version proto [19]
 o zuul.d: update rustls-ffi to version 0.8.2 [5]

This release includes the following known bugs:

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

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

  Bernhard Walle, Dan Fandrich, Daniel Stenberg, Don J Olmstead, Even Rouault,
  Jacob Hoffman-Andrews, Jeff Luszcz, Kevin Burke, Marcel Raad,
  Patrick Monnerat, Paul Howarth, Rikard Falkeborn, Ryan Sleevi, Stan Hu,
  Stefan Eissing, Stephen M. Coakley, Viktor Szakats, Vincent Grande,
  (18 contributors)

References to bug reports and discussions on issues:

 [1] = https://curl.se/bug/?i=7789
 [2] = https://curl.se/bug/?i=7982
 [3] = https://curl.se/bug/?i=7983
 [4] = https://curl.se/bug/?i=7984
 [5] = https://curl.se/bug/?i=8013
 [6] = https://curl.se/bug/?i=8001
 [8] = https://curl.se/bug/?i=8009
 [9] = https://curl.se/bug/?i=8003
 [10] = https://curl.se/bug/?i=8003
 [11] = https://curl.se/bug/?i=8040
 [12] = https://curl.se/bug/?i=8006
 [13] = https://curl.se/bug/?i=8002
 [14] = https://curl.se/bug/?i=7998
 [15] = https://curl.se/bug/?i=8038
 [17] = https://curl.se/bug/?i=7994
 [18] = https://curl.se/bug/?i=7991
 [19] = https://curl.se/bug/?i=7956
 [20] = https://curl.se/bug/?i=8034
 [21] = https://curl.se/bug/?i=8028
 [22] = https://curl.se/bug/?i=8030
 [23] = https://curl.se/bug/?i=8027
 [24] = https://curl.se/bug/?i=8025
 [25] = https://curl.se/bug/?i=8018
 [26] = https://curl.se/bug/?i=8021
 [27] = https://curl.se/bug/?i=8019
 [28] = https://curl.se/bug/?i=8017
 [29] = https://curl.se/bug/?i=8016