curl and libcurl 8.18.1

 Public curl releases:         273
 Command line options:         273
 curl_easy_setopt() options:   308
 Public functions in libcurl:  100
 Contributors:                 3573

This release includes the following changes:


This release includes the following bugfixes:

 o altsvc: only accept 17 byte dates from files [22]
 o build: detect and include `inttypes.h` again [13]
 o cmake: reference OpenSSL and ZLIB imported targets only when enabled [41]
 o cmake: silence useless compiler warnings triggered by the FASTBuild generator [43]
 o config-plan9: set `HAVE_STDINT_H` again [17]
 o curl: limit Windows-specific code to Windows builds, other tidy-ups [48]
 o docs: explicitly call out Slowloris as not a security flaw [6]
 o http/3: add description for known server error codes [15]
 o KNOWN_BUGS.md: absolute Unix domain filename for SOCKS on Windows [37]
 o lib: use (u)int64_t instead of long long [39]
 o Makefile.am: delete RPM targets referencing non-existent files [9]
 o Makefile.am: drop stray VC project files from dist [5]
 o mimepost: allocate main struct on-demand [20]
 o mprintf: drop old sprintf fallback [7]
 o ngtcp2: stabilize recv [18]
 o plan9: drop special build and orphaned references [33]
 o tool: improve error/warning messages when output filename sanitization fails [36]
 o tool_cb_hdr: suppress header output when --out-null [10]
 o tool_dirhie: drop superfluous `F_OK` fallback (Windows) [8]
 o tool_operate: remove 'else' for VMS [3]
 o urldata.h: remove two forward-declared structs not used [4]
 o urldata: change 'keep_post' into three distinct bitfields [21]
 o urldata: convert 'long' fields to fixed variable types [47]
 o urldata: switch to uint* types [1]
 o wolfssl: fix build without USE_BIO_CHAIN [27]

This release includes the following known bugs:

 See https://curl.se/docs/knownbugs.html

For all changes ever done in curl:

 See https://curl.se/changes.html

Planned upcoming removals include:

 o OpenSSL-QUIC
 o RTMP support
 o Support for c-ares versions before 1.16.0
 o Support for Windows XP/2003

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

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

  Andrew Kvalheim, Daniel Stenberg, James Fuller, Joshua Vandaële,
  Megamouse on github, Patrick Monnerat, Ray Satiro, renovate[bot],
  Stefan Eissing, Viktor Szakats
  (10 contributors)

References to bug reports and discussions on issues:

 [1] = https://curl.se/bug/?i=20209
 [3] = https://curl.se/bug/?i=20221
 [4] = https://curl.se/bug/?i=20206
 [5] = https://curl.se/bug/?i=20272
 [6] = https://curl.se/bug/?i=20219
 [7] = https://curl.se/bug/?i=20218
 [8] = https://curl.se/bug/?i=20214
 [9] = https://curl.se/bug/?i=20270
 [10] = https://curl.se/bug/?i=20235
 [13] = https://curl.se/bug/?i=20208
 [15] = https://curl.se/bug/?i=20202
 [17] = https://curl.se/bug/?i=20201
 [18] = https://curl.se/bug/?i=20220
 [20] = https://curl.se/bug/?i=20260
 [21] = https://curl.se/bug/?i=20262
 [22] = https://curl.se/bug/?i=20259
 [27] = https://curl.se/bug/?i=20250
 [33] = https://curl.se/bug/?i=20243
 [36] = https://curl.se/bug/?i=20044
 [37] = https://curl.se/bug/?i=20236
 [39] = https://curl.se/bug/?i=20233
 [41] = https://curl.se/bug/?i=20217
 [43] = https://curl.se/bug/?i=20230
 [47] = https://curl.se/bug/?i=20227
 [48] = https://curl.se/bug/?i=20213