cURL 7.83.0

What's new in this version:

Changed:
- curl: add %header{name} experimental support in -w handling
- curl: add %{header_json} experimental support in -w handling
- curl: add --no-clobber
- curl: add --remove-on-error
- header api: add curl_easy_header and curl_easy_nextheader
- msh3: add support for QUIC and HTTP/3 using msh3

Fixed:
- appveyor: add Cygwin build
- appveyor: only add MSYS2 to PATH where required
- BearSSL: add CURLOPT_SSL_CIPHER_LIST support
- BearSSL: add CURLOPT_SSL_CTX_FUNCTION support
- BINDINGS.md: add Hollywood binding
- CI: Do not use buildconf. Instead, just use: autoreconf -fi
- CI: install Python package impacket to run SMB test 1451
- configure.ac: move -pthread CFLAGS setting back where it used to be
- configure: bump the copyright year range int the generated output
- conncache: include the zone id in the "bundle" hashkey
- connecache: remove duplicate connc->closure_handle check
- connect: make Curl_getconnectinfo work with conn cache from share handle
- connect: use TCP_KEEPALIVE only if TCP_KEEPIDLE is not defined
- cookie.d: clarify when cookies are sent
- cookies: improve errorhandling for reading cookiefile
- curl/system.h: update ifdef condition for MCST-LCC compiler
- curl: error out if -T and -d are used for the same URL
- curl: error out when options need features not present in libcurl
- curl: escape '?' in generated --libcurl code
- curl: fix segmentation fault for empty output file names.
- curl_easy_header: fix typos in documentation
- CURLINFO_PRIMARY_PORT.3: clarify which port this is
- CURLOPT*TLSAUTH.3: they only work with OpenSSL or GnuTLS
- CURLOPT_DISALLOW_USERNAME_IN_URL.3: use uppercase URL
- CURLOPT_PREQUOTE.3: only works for FTP file transfers, not dirs
- CURLOPT_PROGRESSFUNCTION.3: fix typo in example
- CURLOPT_UNRESTRICTED_AUTH.3: extended explanation
- CURLSHOPT_UNLOCKFUNC.3: fix the callback prototype
- docs/HYPER.md: updated to reflect current hyper build needs
- docs/opts: Mention Schannel client cert type is P12
- docs: Fix missing semicolon in example code
- docs: lots of minor language polish
- English: use American spelling consistently
- fail.d: tweak the description
- firefox-db2pem.sh: make the shell script safer
- ftp: fix error message for partial file upload
- gen.pl: change wording for mutexed options
- GHA: add openssl3 jobs moved over from zuul
- GHA: build hyper with nightly rustc
- GHA: move bearssl jobs over from zuul
- gha: move the event-based test over from Zuul
- gtls: fix build for disabled TLS-SRP
- http2: handle DONE called for the paused stream
- http2: RST the stream if we stop it on our own will
- http: avoid auth/cookie on redirects same host diff port
- http: close the stream (not connection) on time condition abort
- http: reject header contents with nul bytes
- http: return error on colon-less HTTP headers
- http: streamclose "already downloaded"
- hyper: fix status_line() return code
- hyper: fix tests 580 and 581 for hyper
- hyper: no h2c support
- infof: consistent capitalization of warning messages
- ipv4/6.d: clarify that they are about using IP addresses
- json.d: fix typo (overriden -> overridden)
- keepalive-time.d: It takes many probes to detect brokenness
- lib/warnless.[ch]: only check for WIN32 and ignore _WIN32
- lib670: avoid double check result
- lib: #ifdef on USE_HTTP2 better
- lib: fix some misuse of curlx_convert_wchar_to_UTF8
- lib: remove exclamation marks
- libssh2: compare sha256 strings case sensitively
- libssh2: make the md5 comparison fail if wrong length
- libssh: fix build with old libssh versions
- libssh: fix double close
- libssh: Improve fix for missing SSH_S_ stat macros
- libssh: unstick SFTP transfers when done event-based
- macos: set .plist version in autoconf
- mbedtls: remove 'protocols' array from backend when ALPN is not used
- mbedtls: remove server_fd from backend
- mk-ca-bundle.pl: Use stricter logic to process the certificates
- mk-ca-bundle.vbs: delete this script in favor of mk-ca-bundle.pl
- mlc_config.json: add file to ignore known troublesome URLs
- mqtt: better handling of TCP disconnect mid-message
- ngtcp2: add client certificate authentication for OpenSSL
- ngtcp2: avoid busy loop in low CWND situation
- ngtcp2: deal with sub-millisecond timeout
- ngtcp2: disconnect the QUIC connection proper
- ngtcp2: enlarge H3_SEND_SIZE
- ngtcp2: fix HTTP/3 upload stall and avoid busy loop
- ngtcp2: fix memory leak
- ngtcp2: fix QUIC_IDLE_TIMEOUT
- ngtcp2: make curl 1ms faster
- ngtcp2: remove remote_addr which is not used in a meaningful way
- ngtcp2: update to work after recent ngtcp2 updates
- ngtcp2: use token when detecting :status header field
- nonblock: restore setsockopt method to curlx_nonblock
- openssl: check SSL_get_peer_cert_chain return value
- openssl: enable CURLOPT_SSL_EC_CURVES with BoringSSL
- openssl: fix CN check error code
- options: remove mistaken space before paren in prototype
- perl: removed a double semicolon at end of line
- pop3/smtp: return *WEIRD_SERVER_REPLY when not understood
- projects/README: converted to markdown
- projects: Update VC version names for VS2017, VS2022
- rtsp: don't let CSeq error override earlier errors
- runtests: add 'bearssl' as testable feature
- runtests: make 'oldlibssh' be before 0.9.4
- schannel: remove dead code that will never run
- scripts/copyright.pl: ignore the new mlc_config.json file
- scripts: move three scripts from lib/ to scripts/
- test1135: sync with recent API updates
- test1459: disable for oldlibssh
- test375: fix line endings on Windows
- test386: Fix an incorrect test markup tag
- test718: edited slightly to return better HTTP
- tests/server/util.h: align WIN32 condition with util.c
- tests: refactor server/socksd.c to support --unix-socket
- timediff.[ch]: add curlx helper functions for timeval conversions
- tls: make mbedtls and NSS check for h2, not nghttp2
- tool and tests: force flush of all buffers at end of program
- tool_cb_hdr: Turn the Location: into a terminal hyperlink
- tool_getparam: error out on missing -K file
- tool_listhelp.c: uppercase URL
- tool_operate: fix a scan-build warning
- tool_paramhlp: use feof(3) to identify EOF correctly when using fread(3)
- transfer: redirects to other protocols or ports clear auth
- unit1620: call global_init before calling Curl_open
- url: check sasl additional parameters for connection reuse.
- vtls: provide a unified APLN-disagree string for all backends
- vtls: use a backend standard message for "ALPN: offers %s"
- vtls: use a generic "ALPN, server accepted" message
- winbuild/README.md: fixup dead link
- winbuild: Add a Visual Studio example to the README
- wolfssl: fix compiler error without IPv6