Log message:
curl: remove rtmp option in bl3.mk as well

Log message:
curl: remove rtmp option

rtmp support was removed in 8.20.0

https://daniel.haxx.se/blog/2026/03/21/bye-bye-rtmp/

Log message:
www/curl: remove unknown configure option

Log message:
curl: update to 8.21.0.

Lots of security fixes.

 Changes:

    curl: named globs in output filename for upload glob references
    HTTP/3: add proxy CONNECT and MASQUE CONNECT-UDP support (ngtcp2 QUIC)
    http2: remove stream dependency tracking
    lib: drop support for CURLAUTH_DIGEST_IE
    libssh: add support for SHA256 host public keys
    tool_urlglob: add named globs

Bugfixes:

    _ENVIRONMENT.md. Windows does case insensitive env variables
    _URL.md: remove the zone-id mention
    AmigaOS: curl_setup.h avoid explicit_bzero with clib2
    AmigaOS: fix build fallouts, re-add to CI
    asyn-thrdd: add IPv6 guards
    asyn-thrdd: fix result processing without wakeup socketpair
    autotools: mbedtls detection fixes
    BINDINGS: Update Hollywood link
    BUFQ.md: re-sync with source code
    build: enable `-Wlogical-op` picky warning for GCC 4.4+
    build: omit zlib pkg-config reference for Android
    cf-h2-prox: fix peer leak
    cf-h2-proxy: drop interim responses
    cf-https-connect: do not engage on proxy origin
    cf-ip-happy.c: minor comment typo
    cf-ip-happy: update documentation
    cf-socket: make Curl_addr2string static
    cf-socket: set scope_id for IPv6 link-local addresses
    cf-socket: store errno from do_connect in ctx->error
    cfilters: fix busy loop on blocked transfers
    chunked: reject invalid bytes in trailer
    CIPHERS.md: fix the example that uses only TLS 1.3
    cmake/FindGSS: drop "MIT Unknown" version value, related tidy ups
    cmake/FindGSS: drop CMake <3.16 compatibility logic
    cmake/FindGSS: fix comment, adjust custom flavor property name
    cmake/FindGSS: prioritize MIT over GNU in pkg-config detection
    cmake: auto-select static nghttp2/nghttp3/ngtcp2 Config
    cmake: export/forward `NGTCP2_CRYPTO_BACKEND`
    cmake: fix three issues generating lib options in config files
    cmake: fix zstd CMake config name
    cmake: opt in `MSVC_VERSION` 1951 to picky warnings
    cmake: quote `COMPONENTS` string in `curl-config.in.cmake`
    cmake: simplify `LINK_ONLY` imported target extraction
    config2setopts: use default protocol properly
    connect: remove deref of freed pointer in trace call
    content_encoding: fix limit failure message
    content_encoding: fix non-last chunked rejection
    content_encoding: timeout during slow decoding
    cookie: check __Secure- and __Host- case sensitively when read from file
    cookie: compare path case sensitively
    cookie: reject control octets in file-loaded cookies
    cookie: simplify strstore(), remove outdated comment
    cookie: tailmatch the domains for secure override
    cookie: trim trailing dots when checking PSL
    creds: add sasl service name
    creds: create with empty user+pass
    creds: mask OAuth bearer token in trace logs
    creds: remove two unused functions
    curl_easy_pause.md: rephrase the stream cache when pause clause
    curl_easy_setopt.md: change options when no transfer runs
    curl_formdata: fix to pass long where missing, document `CURLFORM_NAMELENGTH`
    curl_multi_assign.md: clarify lifetime
    curl_ntlm_core: fix nettle 4+ builds in certain MultiSSL combos
    curl_ntlm_core: propagate DES `CryptEncrypt()` error
    curl_sha512_256: fix result code on error
    CURLINFO_CONTENT_LENGTH_UPLOAD_T.md: expand
    CURLMOPT_SOCKETFUNCTION.md: this sends *all* file descriptors
    CURLOPT_CHUNK_BGN_FUNCTION: target is there for symlinks only
    CURLOPT_DISALLOW_USERNAME_IN_URL: is for CURLOPT_URL only
    CURLOPT_DOH_URL.md: does not inherit proxy options
    CURLOPT_ECH.md: simplify the description language
    CURLOPT_HAPROXYPROTOCOL.md: only sent for newly setup connections
    CURLOPT_MAXFILESIZE: clarify this also works for on-going transfers
    CURLOPT_PINNEDPUBLICKEY.md: does not apply for other origins
    CURLOPT_PORT.md: use stronger language
    CURLOPT_SHARE: warn about early remove
    CURLOPT_SSH_HOSTKEYFUNCTION.md: for new connections only
    CURLOPT_WRITEFUNCTION.md: mention redirects
    CURLOPT_WRITEFUNCTION.md: remove stray reference to HSTS
    delta: harden external command invocations
    digest: escape control codes too
    digest: flush proxy state on proxy or credential change
    digest: flush state on origin or credential change
    dns-httpsrr-lookup: use origin, not peer
    dnscache: remove Curl_dns_entry_link
    docs/libcurl: fix the version for curl_multi_socket_action
    docs: end "...can be used several times..." sentences with period
    docs: fix --follow doc typo
    docs: fix a couple of typos
    docs: fix grammar and wording in FAQ
    docs: fix odd wording in CONTRIBUTE.md
    docs: note CURLOPT_PINNEDPUBLICKEY has no effect on legacy LDAP backend
    docs: returned header size reflects HTTP/1-style format
    doh: cap the maximum TTL to 24 hours
    doh: stricter HTTPS RNAME parsing
    ECH: cleanups
    event: fix wakeup consumption
    ftp: avoid accessing EPSV response one byte past the NULL
    ftp: remove 2 Curl_resolv_blocking() calls
    ftp: remove bits.ftp_use_control_ssl
    ftplistparser: clear strings.target if not symlink
    gnutls: allow building with nettle 4.0
    gnutls: fix more nettle 4+ compatibility issues
    gnutls: require 3.7.2 for earlydata
    gsasl: fix potential double free
    gtls: fix ignored return and uninitialized status in OCSP check
    gtls: fix some typos
    gtls: minor fixes and improvements
    gtls: use the correct return code in trace output
    gtls: verify OCSP response signature in gtls_verify_ocsp_status
    h3-proxy: fix callback return values, and a typo in tests
    hostip: remove unused MAX_HOSTCACHE_LEN and MAX_DNS_CACHE_SIZE
    hsts.md: mention multiple curl invokes effect
    hsts: duplicate live HSTS data in curl_easy_duphandle
    http-proxy: verify CONNECT response headers
    HTTP3.md: update quiche build
    http: don't pass on set cookies to new origins
    http: prefer chunked encoding over Content-Length: 0
    http: reject spurious CR bytes in headers
    http_digest: return better error
    idn: replace header guards with forward declaration
    INSTALL-CMAKE.md: document CMake environment variables
    INTERNALS.md: document minimum nghttp3 and ngtcp2 versions
    KNOWN_BUGS.md: remove fixed GnuTLS <-> OpenSSL incompat bug
    KNOWN_BUGS: remove stale Threads::Threads entry
    krb5_sspi: fix error message on `DecryptMessage()` fail
    ldap: base64 encode binary LDIF values with WinLDAP
    ldap: fix minor leak on write callback error
    ldap: fix to not leak `attribute` on OOM (WinLDAP)
    ldap: switch off chasing referrals
    lib678: fix to not be perma-skipped
    lib: make `__STDC_VERSION__` literals `L` (where missing)
    lib: transfer origin and proxy handling
    lib: two minor typos
    libcurl-easy.md: minor clarifications
    libssh2: do not use deprecated macros when unavailable
    libssh2: drop stray double-negative from `strncmp()` result
    libssh2: fix to return error code on missing parameter
    libssh2: replace macro names with non-misspelled alternatives
    libssh2: save non-standard port to `known_hosts`
    libssh2: sync version check with INTERNALS.md
    libssh2: use non-deprecated `libssh2_knownhost_addc()`
    libssh: map SSH_KNOWN_HOSTS_OTHER to CURLKHMATCH_MISMATCH
    m4: drop redundant conditions in TLS library detections
    Makefile.am: drop test1190 listed twice
    managen: apply minor fixes and improvements
    mbedtls: null-terminate the private key blob
    mk-unity.pl: `#include`, and not concatenate input headers
    mqtt: return error on truncated Remaining Length
    mqtt: validate PINGRESP and DISCONNECT have remaining_length == 0
    multi: handle pause in multi socket callback
    multi: remove a stale comment
    multi: silence gcc 16 `-Wnull-dereference`, bump CI job to test
    multi: xfers_really_alive
    netrc: remember and check filename loaded
    netrc: scanner refactor
    ngtcp2: fail handshake directly
    openssl: do not mix OpenSSL int result with `CURLcode` variable
    os400sys: fix theoretical length overflows
    peer.h: fix typo in comment
    pingpong: reject nul byte in server response line
    progress: fix CURLINFO time reporting
    psl: require libpsl 0.16.0 (2016-12-10) or greater
    pytest: pass `--disable` to curl
    pytest: re-enable test test_05_01 and test_05_02 for quiche 0.29.0+
    pythonlint.sh: make it fail on error, fix ruff warnings in pytest
    quic: count zero length packets against max
    ratelimits: use minimal burst rate
    RELEASE-PROCEDURE.md: update coming release dates
    resolve: mention in error that IP address is expected
    rtsp: bump buf after rtsp_filter_rtp()
    runner.pm: apply minor correctness fix
    runner.pm: set `CURL_TESTNUM` for `precheck` commands
    runtests: fix tests for curl builds with embedded CA bundle
    rustls: error on CURLOPT_CRLFILE with native CA store
    schannel: check `schannel_sha256sum()` success, and more
    schannel: enforce Extended Key Usage for custom CA roots
    schannel: error on TLS 1.3-only with cipher list
    schannel: fix https proxy for client cert and certinfo
    schannel: fix revoke_best_effort setting for proxy
    schannel: use fopen instead CreateFile
    schannel_verify: avoid out of blob access
    schannel_verify: simplify CryptQueryObject use
    scripts: catch Credits-to contributors
    SECURITY-ADVISORY.md: expand
    setopt: changing the proxy port is also a proxy change
    setopt: clear proxy auth properly on NULL
    setopt: clear the "custom" CA booleans when set to NULL
    setopt: CURLOPT_MAXCONNECTS set to 0 restores default value
    setopt: defref the old referer when setting a new
    setopt: fix to honor `CURLOPT_PROXY_CAINFO_BLOB` over Native CA
    setopt: gate a few proxy TLS options by checking backend support
    setopt: more careful cleanup of the HSTS cache
    setopt: return error if received `curl_blob->data` is NULL
    show-headers.md: mention bold headers and --no-styled-output
    sigv4: URL encode the username in the header
    smb: constify `strchr()` result variable
    smb: integer overflow proof a size check
    smbserver: update internal id generation for Python 3
    socket: introduce `SOCK_EAGAIN()` and use it
    socket: use name `sockerr` for socket error variables
    socks_sspi: invalid response length is a fatal error
    socks_sspi: store socks5_gssapi_enctype
    spnego_sspi: honor CURLOPT_GSSAPI_DELEGATION for Windows SSPI
    spnego_sspi: preserve distinction btw policy-only and uncond delegation
    src: fix comment typos
    src: sync nghttp2 versions checks with current requirements
    ssl native_ca_store: always reinit
    SSLCERTS: document 8.19.0 default Native CA builds (Windows)
    sspi: clear SSPI credentials on AcquireCredentialsHandle failure
    sspi: free libcurl allocated memory with curlx_free
    telnet: drop an `int` cast no longer necessary
    telnet: drop redundant interim variables
    telnet: fix error message typos
    telnet: fix old copy-paste typo in variable name
    telnet: honor CURLOPT_TIMEOUT in send_telnet_data()
    test1588: use %TESTNUMBER, not hard-coded number
    test1981: explicitly set the locale
    tests: add `cookies` feature to some tests
    tests: add an assert to avoid IPC blocking
    tests: add the "--resolve" keyword to tests that lack it
    tests: fix unit1636 with --disable-progress-meter
    tftp: avoid the timeout calc if the timeout is crazy
    tftp: stricter option name checks
    tidy-up: add space around operators, where missing
    tidy-up: apply clang-format fixes
    tidy-up: drop stray casts for allocated pointers
    tidy-up: miscellaneous
    tls: fix incomplete mTLS config in conn reuse and session cache
    tls: wolfssl: fixes for PQC key shares
    tool: warn when --ssl and --ftp-ssl-control override each other
    tool_formparse.c: fix two minor comment typos
    tool_formparse: polish error message + make two functions static
    tool_formparse: tool2curlparts is no longer recursive
    tool_help: rectify a bad assert
    tool_operhlp: avoid NULL to %s
    tool_urlglob: avoid overflow at end of range
    tool_urlglob: better 'Duplicate glob name' position
    tool_urlglob: make globbing error reported for correct position
    tool_writeout: fix %time{} output for %s
    transfer: clear referer when set to NULL
    unit1675: fix potential memory leak on dynbuf fail path
    unix-sockets: ignore proxy settings
    URL-SYNTAX: document more URL parsing details
    url: compare full origin when setting credentials
    url: connection credentials origin
    url: connection reuse fixes for starttls
    url: detect proxy changes read from environment
    url: don't log bits.close state
    url: fix connection reuse for starttls protocols
    url: keep the question mark for empty queries
    url: remove superfluous check
    url: url_match_destination fix
    urlapi: accept 0X prefix in IPv4 address as well
    urlapi: change more lowercase percent-encoded to uppercase
    urlapi: compare zone-id in Curl_url_same_origin()
    urlapi: consume trailing dots after IPv4 numerical addresses
    urlapi: deny hostnames with more than one trailing dot
    urlapi: drop base fragment on empty redirect
    urlapi: fix an issue parsing file URLs
    urlapi: fix memleaks on error in `parse_hostname_login()`
    urlapi: fix redirect handling if CURLU_NO_GUESS_SCHEME is set
    urlapi: forbid '|' in host
    urlapi: handle redirect without set scheme with default-scheme
    urlapi: URL decode hostname before IP address normalization
    user-agent.md: mention double quotes too
    var: use a dedicated pointer for the alloc
    verify-release: verify more thoroughly with git
    vquic: drop stray casts for `iovec.iov_len`
    vtls: more large buffer support and error checks for SHA-256
    vtls: use Curl_safecmp for CRLfile and pinned_key comparison
    vtls_scache: include signature_algorithms in the SSL peer cache key
    vtls_spack: drop redundant macro fallbacks
    VULN-DISCLOSURE-POLICY.md: emphasize comm as a human
    VULN-DISCLOSURE-POLICY.md: emphasize the no email thank you part
    VULN-DISCLOSURE-POLICY.md: test code is not secure
    VULN-DISCLOSURE-POLICY: non-released code
    websockets: auto-tunnel through http proxy
    websockets: buffer upgrade data at connection level
    windows: update MS SDK versions in comments
    winldap: avoid NULL pointer deref on `ldap_get_dn()` fail
    ws: make pong sending lazy
    x509asn1: fix DH public key parameter extraction
    x509asn1: fix operator order in do_pubkey

Log message:
curl/libcurl-gnutls: fix build with nettle 4.0; support Darwin

Log message:
curl: document the circular dependency

We have it in the CVS history, but let's document it as an "XXX" \ 
comment too so
possible future hands are less tempted to just uncomment them!

Thanks <ryoon> and Marc Baudoin!

Log message:
www/curl: Remove http3 option

nghttp3, cmake and curl cause circular dependency.
Reported by Marc Baudoin. Thank you.

Log message:
www/curl: Add http3 option