curl and libcurl 7.73.1

 Public curl releases:         196
 Command line options:         234
 curl_easy_setopt() options:   278
 Public functions in libcurl:  85
 Contributors:                 2275

This release includes the following changes:

 o

This release includes the following bugfixes:

 o alt-svc: enable (in the build) by default [20]
 o checksrc: warn on empty line before open brace [13]
 o CI/appveyor: disable test 571 in two cmake builds [22]
 o CI/azure: improve on flakiness by avoiding libtool wrappers [7]
 o CI/travis: add brotli and zstd to the libssh2 build [27]
 o cmake: call the feature unixsockets without dash [26]
 o cmake: set the unicode feature in curl-config on Windows [23]
 o cmake: store IDN2 information in curl_config.h [25]
 o connect: repair build without ipv6 availability [19]
 o curl_url_set.3: fix typo in the RETURN VALUE section [3]
 o CURLOPT_NOBODY.3: fix typo [6]
 o CURLOPT_TCP_NODELAY.3: fix comment in example code [8]
 o CURLOPT_URL.3: clarify SCP/SFTP URLs are for uploads as well
 o http3: fix two build errors, silence warnings [10]
 o libcurl.pc: make it relocatable [15]
 o libssh2: fix build with disabled proxy support [17]
 o libssh2: require version 1.0 or later [24]
 o Makefile.m32: add support for HTTP/3 via ngtcp2+nghttp3 [11]
 o openssl: acknowledge SRP disabling in configure properly [9]
 o os400: Sync libcurl API options [5]
 o packages/OS400: make the source code-style compliant [4]
 o runtests: return error if no tests ran [16]
 o runtests: revert the mistaken edit of $CURL
 o src/tool_filetime: disable -Wformat on mingw for this file [2]
 o strerror: use 'const' as the string should never be modified [18]
 o test122[12]: remove these two tests [1]
 o tool_help: make "output" description less confusing [21]
 o tool_operate: fix compiler warning when --libcurl is disabled [12]
 o urlapi: URL encode a '+' in the query part [14]

This release includes the following known bugs:

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

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

  b9a1 on github, Baruch Siach, Basuke Suzuki, Cristian Morales Vega,
  Daniel Stenberg, Dietmar Hauser, Emil Engler, Jon Rumsey, Marcel Raad,
  Marc Hörsken, Philipp Klaus Krause, Ray Satiro, Tom G. Christensen,
  Viktor Szakats,
  (14 contributors)

        Thanks! (and sorry if I forgot to mention someone)

References to bug reports and discussions on issues:

 [1] = https://curl.haxx.se/bug/?i=6080
 [2] = https://curl.haxx.se/bug/?i=6079
 [3] = https://curl.haxx.se/bug/?i=6102
 [4] = https://curl.haxx.se/bug/?i=6085
 [5] = https://curl.haxx.se/bug/?i=6083
 [6] = https://curl.haxx.se/bug/?i=6097
 [7] = https://curl.haxx.se/bug/?i=6049
 [8] = https://curl.haxx.se/bug/?i=6096
 [9] = https://curl.haxx.se/mail/lib-2020-10/0037.html
 [10] = https://curl.haxx.se/bug/?i=6093
 [11] = https://curl.haxx.se/bug/?i=6092
 [12] = https://curl.haxx.se/bug/?i=6095
 [13] = https://curl.haxx.se/bug/?i=6088
 [14] = https://curl.haxx.se/bug/?i=6086
 [15] = https://curl.haxx.se/bug/?i=6061
 [16] = https://curl.haxx.se/bug/?i=6053
 [17] = https://curl.haxx.se/bug/?i=6125
 [18] = https://curl.haxx.se/bug/?i=6068
 [19] = https://curl.haxx.se/bug/?i=6069
 [20] = https://curl.haxx.se/bug/?i=5868
 [21] = https://curl.haxx.se/bug/?i=6118
 [22] = https://curl.haxx.se/bug/?i=6119
 [23] = https://curl.haxx.se/bug/?i=6117
 [24] = https://curl.haxx.se/bug/?i=6116
 [25] = https://curl.haxx.se/bug/?i=6108
 [26] = https://curl.haxx.se/bug/?i=6108
 [27] = https://curl.haxx.se/bug/?i=6105