GHA: detect and warn for more English contractions

As we try to avoid them in curl documentation

Closes #13940

transfer: do not use EXPIRE_NOW while blocked

- When a transfer sets `data->state.select_bits`, it is
scheduled for rerun with EXPIRE_NOW. If such a transfer
is blocked (due to P

transfer: do not use EXPIRE_NOW while blocked

- When a transfer sets `data->state.select_bits`, it is
scheduled for rerun with EXPIRE_NOW. If such a transfer
is blocked (due to PAUSE, for example), this will lead to
a busy loop.
- multi.c: check for transfer block
- sendf.*: add Curl_xfer_is_blocked()
- sendf.*: add client reader `is_paused()` callback
- implement is_paused()` callback where needed

Closes #13908

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ci: update dependency ngtcp2/ngtcp2 to v1.6.0

Closes #13939

ci: update ngtcp2/nghttp3 to v1.4.0

Closes #13938

cmake: stop setting SOVERSION for the static lib target

Also move the logic closer to its use and related tidy-ups.

Cherry-picked from #13898
Closes #13936

os400: make it compilable again

A newly introduced use of getsockname() in the cli tool makes it require
the ascii wrapper module, which is not available outside of the library:
as t

os400: make it compilable again

A newly introduced use of getsockname() in the cli tool makes it require
the ascii wrapper module, which is not available outside of the library:
as the tool only uses the address family field (binary), disable
wrappers outside of libcurl.

Fix setsockopt() parameter type mismatch using a (void *) cast.

Sync ILE/RPG binding.

Closes #13930

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libcurl.pc: add `Requires.private`, `Requires` for static linking

- cmake: populate for dependencies.
- autotools: populate for dependencies.
(including mbedtls, though the script

libcurl.pc: add `Requires.private`, `Requires` for static linking

- cmake: populate for dependencies.
- autotools: populate for dependencies.
(including mbedtls, though the script does not detect
mbedtls through pkgconfig. mbedtls 3.6.0 now supports it.)

Skip dealing with gssapi in this patch.

Fixes #864
Closes #13911

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cmake: bring `curl-config.cmake` closer to `FindCURL`

Set `CURL_LIBRARIES` and `CURL_INCLUDE_DIRS` variables
for compatibility with CMake's `FindCURL.cmake`:
https://github.com/Kitwa

cmake: bring `curl-config.cmake` closer to `FindCURL`

Set `CURL_LIBRARIES` and `CURL_INCLUDE_DIRS` variables
for compatibility with CMake's `FindCURL.cmake`:
https://github.com/Kitware/CMake/blob/b411d0146c2e06acfb0c823bb039e99f0191b611/Modules/FindCURL.cmake#L209

For dependent projects, CMake's suggestion is to replace
`CURL_LIBRARIES` with `CURL::libcurl`, and drop `CURL_INCLUDE_DIRS`.

Reported-by: Aurélien Pierre
Ref: https://curl.se/mail/lib-2024-06/0014.html
Ref: https://gitlab.kitware.com/cmake/cmake/-/issues/24580
Closes #13897

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tool_getparam: fix the bsearch call for ip-tos names

Follow-up to 3c20ae08b9591
Reported-by: Samuel Chiang
Fixes #13932
Closes #13933

request: change the struct field bodywrites to a bool, only for hyper

Only hyper needs to know this, and it can use it as a boolean.

Closes #13928

test: fix CURLOPT_TCP_KEEPCNT typo

Follow up to b77d627d242

Closes #13931

http: remove "struct HTTP"

It is not actually used anymore and only contained a dummy struct field.
Remove all traces and uses of it.

Closes #13927

cd2nroff: convert two warnings to errors

Since the warnings tend to get missed too easily and these are problems
we rather want addressed than letting slide.

Closes #13929

urlapi: use a correct value for CURLU_NO_GUESS_SCHEME

It was mistakenly set to the same value as CURLU_GET_EMPTY uses.

Reported-by: Patrick Monnerat
Bug: https://github.com/curl

urlapi: use a correct value for CURLU_NO_GUESS_SCHEME

It was mistakenly set to the same value as CURLU_GET_EMPTY uses.

Reported-by: Patrick Monnerat
Bug: https://github.com/curl/curl/commit/655d44d139489625e77cf6790d36
Closes #13926

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file: separate fake headers and body with a stand-alone CRLF

Instead of bolting on the extra CRLF to the final header - as that makes
the behavior inconsistent and not as documented. The

file: separate fake headers and body with a stand-alone CRLF

Instead of bolting on the extra CRLF to the final header - as that makes
the behavior inconsistent and not as documented. The final CRLF is now
also made unconditional, just like it is for HTTP.

Reported-by: dogma
Bug: https://curl.se/mail/lib-2024-06/0033.html
Closes #13925

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RELEASE-NOTES: synced

tcpkeepalive: add CURLOPT_TCP_KEEPCNT and --keepalive-cnt

Closes #13885

TODO: make it "Add missing features to TLS backends"

... instead of just mentioning CA caching.

Closes #13924

curl: support VLAN Priority: --vlan-priority

Add --vlan-priority option to the command line tool for setting VLAN
priority.

Closes #13907

misc: fix typos

Closes #13923

CURLOPT_ECH.md: remove repeated 'if'

Closes #13922

vms: fixed language in comment

It started with me fixing a repeated "are are" but the wording was
incomprehensible so I tried to untangle it.

Closes #13921

lib: xfer_setup and non-blocking shutdown

- clarify Curl_xfer_setup() with RECV/SEND flags and different calls for
which socket they operate on. Add a shutdown flag for secondary

lib: xfer_setup and non-blocking shutdown

- clarify Curl_xfer_setup() with RECV/SEND flags and different calls for
which socket they operate on. Add a shutdown flag for secondary
sockets
- change Curl_xfer_setup() calls to new functions
- implement non-blocking connection shutdown at the end of receiving or
sending a transfer

Closes #13913

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test1486: verify that write-out.md and tool_writeout.c are in sync

- also verify alphabetialal order in the source
- add two missing variables to write-out.md

Closes #13920

GHA: add cmake MSYS2 native job

curl, libcurl, examples, build-only.

To compare build behaviour with autotools.

Closes #13917