Changes in 7.83.0 - April 27 2022

Changes:

• 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

Bugfixes:

• 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 filenames.
• 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

Further