cURL 7.76.0

What's new in this version:

Changed:
- cookies: Support multiple -b parameters
- curl: add --fail-with-body
- doh: add options to disable ssl verification
- http: add support to read and store the referrer header
- sasl: support SCRAM-SHA-1 and SCRAM-SHA-256 via libgsasl
- vtls: initial implementation of rustls backend

Fixed:
- CVE-2021-22876: strip credentials from the auto-referer header field
- CVE-2021-22890: add 'isproxy' argument to Curl_ssl_get/addsessionid()
- asyn-ares: use consistent resolve error message
- BUG-BOUNTY: removed the cooperation mention
- build: delete unused feature guards
- build: fix --disable-dateparse
- build: fix --disable-http-auth
- build: remove all traces of USE_BLOCKING_SOCKETS
- c-hyper: Remove superfluous pointer check
- c-hyper: support automatic content-encoding
- CI/azure: disable test 433 on azure-ubuntu
- CI/azure: replace python-impacket with python3-impacket
- ci: stop building on freebsd-12-1
- cmake: fix import library name for non-MS compiler on Windows
- cmake: use CMAKE_INSTALL_INCLUDEDIR indirection
- cmake: support WinIDN
- config: fix building SMB with configure using Win32 Crypto
- config: fix detection of restricted Windows App environment
- configure: fail if --with-quiche is used and quiche isn't found
- configure: make AC_TRY_* into AC_*_IFELSE
- configure: make hyper opt-in, and fail if missing
- configure: only add OpenSSL paths if they are defined
- configure: provide Largefile feature for curl-config
- configure: remove use of deprecated macros
- configure: s/AC_HELP_STRING/AS_HELP_STRING
- cookies: Fix potential NULL pointer deref with PSL
- curl: set CURLOPT_NEW_FILE_PERMS if requested
- curl_easy_setopt.3: add curl_easy_option* functions to SEE ALSO
- curl_multibyte: always return a heap-allocated copy of string
- curl_multibyte: fall back to local code page stat/access on Windows
- Curl_timeleft: check both timeouts during connect
- curl_url_set.3: mention CURLU_PATH_AS_IS
- CURLOPT_QUOTE.3: clarify that libcurl doesn't parse what's sent
- docs/HTTP2: remove the outdated remark about multiplexing for the tool
- docs/Makefile.inc: format to be update-friendly
- docs: add CURLOPT_CURLU to 'See also' in curl_url_ functions
- docs: add missing Arg tag to --stderr
- docs: Add SSL backend names to CURL_SSL_BACKEND
- docs: clarify timeouts for queued transfers in multi API
- docs: Explain DOH transfers inherit some SSL settings
- docs: fix FILE example url in --metalink documentation
- docs: make gen.pl support *italic* and **bold**
- doh: Fix sharing user's resolve list with DOH handles
- doh: Inherit CURLOPT_STDERR from user's easy handle
- dynbuf: bump the max HTTP request to 1MB
- examples: Remove threaded-shared-conn.c due to bug
- file: Support unicode urls on windows
- ftp: add 'list_only' to the transfer state struct
- ftp: add 'prefer_ascii' to the transfer state struct
- FTP: allow SIZE to fail when doing (resumed) upload
- ftp: avoid SIZE when asking for a TYPE A file
- ftp: fix Codacy/cppcheck warning about null pointer arithmetic
- ftp: fix memory leak in ftp_done
- ftp: never set data->set.ftp_append outside setopt
- gen.pl: quote "bare" minuses in the nroff curl.1
- github: add torture-ftp for FTP-only torture testing
- gnutls: assume nettle crypto support
- gskit: correct the gskit_send() prototype
- hostip: fix build with sync resolver
- hostip: fix crash in sync resolver builds that use DOH
- hsts: remove unused defines
- http2: don't set KEEP_SEND when there's no more data to be sent
- http2: fail if connection terminated without END_STREAM
- http: cap body data amount during send speed limiting
- http: do not add a referrer header with empty value
- http: make 416 not fail with resume + CURLOPT_FAILONERRROR
- http: remove superfluous NULL assign
- http: strip default port from URL sent to proxy
- http: use credentials from transfer, not connection
- ldap: use correct memory free function
- lib1536: check ptr against NULL before dereferencing it
- lib1537: check ptr against NULL before dereferencing it
- lib: remove 'conn->data' completely
- libssh2: kdb_callback: get the right struct pointer
- libssh2:ssh_connect: clear session pointer after free
- memdebug: close debug logfile explicitly on exit
- mingw: enable using strcasecmp()
- multi: close the connection when h2=>h1 downgrading
- multi: do once-per-transfer inits in before_perform in DID state
- multi: rename the multi transfer states
- multi: update pending list when removing handle
- ngtcp2: adapt to the new recv_datagram callback
- ngtcp2: clarify calculation precedence
- ngtcp2: Fix build error due to change in ngtcp2_addr_init
- ngtcp2: sync with recent API updates
- openldap: avoid NULL pointer dereferences
- openssl: adapt to v3's new const for a few API calls
- openssl: ensure to check SSL_CTX_set_alpn_protos return values
- openssl: remove get_ssl_version_txt in favor of SSL_get_version
- openssl: set the transfer pointer for logging early
- OS400: update for CURLOPT_AWS_SIGV4
- parse_proxy: fix a memory leak in the OOM path
- pathhelp.pm: fix use of pwd -L in Msys environment
- projects: Update VS projects for OpenSSL 1.1.x
- quiche: fix build error: use 'int' for port number
- quiche: fix crash when failing to connect
- retry-all-errors.d: Explain curl errors versus HTTP response errors
- retry.d: Clarify transient 5xx HTTP response codes
- runtests.pl: add %TESTNUMBER variable to make copying tests more convenient
- runtests.pl: add a -P option to specify an external proxy
- runtests.pl: kill processes locking test log files
- setopt: error on CURLOPT_HTTP09_ALLOWED set true with Hyper
- test1188: change error to check for: --fail HTTP status
- test220/314: adjust to run with Hyper
- test304: header CRLF cleanup to work with Hyper
- test306: make it not run with Hyper
- tests: disable .curlrc in more environments
- tests: use %TESTNUMBER instead of fixed number
- tftp: remove the 3600 second default timeout
- time: enable 64-bit time_t in supported mingw environments
- tool_help: add missing argument for --create-file-mode
- tool_help: Increase space between option and description
- tool_operate: bail if set CURLOPT_HTTP09_ALLOWED returns error
- travis: add a rustls build
- travis: bump wolfssl to 4.7.0
- travis: only build wolfssl when needed
- travis: split "torture" into a separate "events" build
- travis: switch ngtcp2 build over to quictls
- travis: use ubuntu nghttp2 package instead of build our own
- url.c: use consistent error message for failed resolve
- url: fix memory leak if OOM in the HSTS handling
- url: fix possible use-after-free in default protocol
- urldata: don't touch data->set.httpversion at run-time
- urldata: fix build without HTTP and MQTT
- urldata: make 'actions[]' use unsigned char instead of int
- urldata: merge "struct DynamicStatic" into "struct UrlState"
- urldata: remove the 'rtspversion' field
- urldata: remove the _ORIG suffix from string names
- version.d: Add missing features to the features list
- wolfssl: don't store a NULL sessionid