GHA/windows: mark 3023, 3024 flaky for mingw-w64 7.3.0 job

They became flaky recently as reported by Testclutch and firsthand
observations. It's curious because it only seems to happen i

GHA/windows: mark 3023, 3024 flaky for mingw-w64 7.3.0 job

They became flaky recently as reported by Testclutch and firsthand
observations. It's curious because it only seems to happen in 7.3.0,
but not in the very similar (except non-Unicode) 9.5.0 job.

We've found no explanation or reason for them so far.

```
test 3023...[HTTPS GET to localhost, first subject alt name matches, CN does not match (Schannel variant)]

3023: protocol FAILED!
There was no content at all in the file log/14/server.input.
Server glitch? Total curl failure? Returned: 7
```
Ref: https://github.com/curl/curl/actions/runs/10871191391/job/30164710777?pr=14918#step:13:4849

```
test 3024...[HTTPS GET to localhost, last subject alt name matches, CN does not match (Schannel variant)]

3024: protocol FAILED!
There was no content at all in the file log/8/server.input.
Server glitch? Total curl failure? Returned: 7
```
Ref: https://github.com/curl/curl/actions/runs/10871191391/job/30164710777?pr=14918#step:13:4713

```
FAIL 3023: 'HTTPS GET to localhost, first subject alt name matches, CN does not match (Schannel variant)' HTTPS, HTTP GET, PEM certificate
FAIL 3024: 'HTTPS GET to localhost, last subject alt name matches, CN does not match (Schannel variant)' HTTPS, HTTP GET, PEM certificate
```
https://github.com/curl/curl/actions/runs/10982991876/job/30491895264?pr=14930#step:14:4914
https://github.com/curl/curl/actions/runs/10871191391/job/30164710777?pr=14918
https://github.com/curl/curl/actions/runs/10841065505/job/30084573629?pr=14859#step:13:5484
https://github.com/curl/curl/actions/runs/10858001821/job/30135376138?pr=14906#step:13:4841

Reported-by: Testclutch
Fixes https://github.com/curl/curl/pull/14905#issuecomment-2350772804
Ref: https://github.com/curl/curl/discussions/14854#discussioncomment-10652044

Closes #15006

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curl: add options for safe/no CA bundle search (Windows)

Add `CURL_CA_SEARCH_SAFE` build-time option to enable CA bundle search
in the `curl` tool directory. The lookup method was alread

curl: add options for safe/no CA bundle search (Windows)

Add `CURL_CA_SEARCH_SAFE` build-time option to enable CA bundle search
in the `curl` tool directory. The lookup method was already used to find
`.curlrc` and `_curlrc` (on Windows). On Windows it overrides the unsafe
default `SearchPath()` method.

Enable with:
- cmake: `-DCURL_CA_SEARCH_SAFE=ON`
- autotools: `--enable-ca-search-safe`
- raw: `CPPFLAGS=-DCURL_CA_SEARCH_SAFE`

On Windows, before this patch the whole `PATH` was searched for
a CA bundle. `PATH` may contain unwanted or world-writable locations,
including the current directory. Searching them all is convenient to
pick up any CA bundle, but not secure.

The Muldersoft curl distro implements such CA search via a custom
patch for Windows:
https://github.com/lordmulder/cURL-build-win32/blob/cd652d4792c177c98b08b4309d3cac2b8dbbf9b0/patch/curl_tool_doswin.diff#L50

MSYS2/mingw-w64 distro has also been rolling a patch solving this:
https://github.com/msys2/MINGW-packages/blob/master/mingw-w64-curl/0001-Make-cURL-relocatable.patch
https://github.com/msys2/MINGW-packages/blob/master/mingw-w64-curl/pathtools.c

Also add option to fully disable Windows CA search:
- cmake: `-DCURL_DISABLE_CA_SEARCH=ON`
- autotools: `--disable-ca-search`
- raw: `CPPFLAGS=-DCURL_DISABLE_CA_SEARCH`.

Both options are considered EXPERIMENTAL, with possible incompatible
changes or even (partial) removal in the future, depending on feedback.

An alternative, secure option is to embed the CA bundle into the binary.

Safe search can be extended to other platforms if necessary or useful,
by using `_NSGetExecutablePath()` (macOS),
`/proc/self/exe` (Linux/Cygwin), or `argv[0]`.

Closes #14582

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GHA/windows: formatting

Follow-up to 1b8449674adb57ee0f60e761d654c69b20ee8fcf #14992

GHA: use more ninja, build examples in the last step, and more

- linux: bump up test parallelism for valgrind tests to `-j4`
(from `-j2`). (EXPERIMENTAL)
- linux: drop `apt-get upd

GHA: use more ninja, build examples in the last step, and more

- linux: bump up test parallelism for valgrind tests to `-j4`
(from `-j2`). (EXPERIMENTAL)
- linux: drop `apt-get update` for the default architecture on the GHA
native runner. It makes prereq install steps complete faster.
The runner image gets weekly updates, and that should be enough to
guarantee fresh packages in most cases:
https://github.com/actions/runner-images/commits/main/images/ubuntu/Ubuntu2204-Readme.md
- aws-lc: use ninja with cmake.
- aws-lc: build examples with cmake.
- aws-lc: drop `apt update`.
- aws-lc, wolfssl, linux32, http3-linux: move building examples to
the last step.
Follow-up to 45202cbba4bb3d12b4469063864b57d2f8765d9c #14906
- windows: formatting.

Closes #14992

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GHA: revert some build test steps added by #14772

They are still slow in these jobs/combinations.

- non-native/FreeBSD/arm64 autotools +36s
- non-native/FreeBSD/arm64 cmake +1m

GHA: revert some build test steps added by #14772

They are still slow in these jobs/combinations.

- non-native/FreeBSD/arm64 autotools +36s
- non-native/FreeBSD/arm64 cmake +1m
- windows/linux-cross-mingw-w64 autotools +33s

These ones remain:
- linux/aws-lc cmake +6s
- windows/linux-cross-mingw-w64 cmake +12s

Follow-up to 71cf0d1fca9e1f53524e1545ef0c08d174458d80 #14772

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tests: speed up builds with single-binary test bundles

Add support for single-block binaries that contain all libtests and
unit tests respectively.

Enable with:
- autotools:

tests: speed up builds with single-binary test bundles

Add support for single-block binaries that contain all libtests and
unit tests respectively.

Enable with:
- autotools: `--enable-test-bundles`
- cmake: `-DCURL_TEST_BUNDLES=ON`

(They are compatible with `--enable-unity` and `-DCMAKE_UNITY_BUILD=ON`
options, for further speed-up.)

Makes libtests and unit tests build _fast_, needing little disk space
even in static mode. Similar to CMake unity mode, but with a custom
script, also supporting autotools builds.

The price is having to deal with symbols/macros colliding between
`lib*.c` and `unit*.c` sources. Maybe with naming conventions or other
solutions this can be improved gradually and reduce the need for manual
intervention by `mk-bundle.mk`. I've included a script that does the bulk
of detecting name collisions.

Also:
- CI: enable test bundles.
- CI: build tests in more jobs.
- lib2305: fix FILE handle leak.
- unit1661: fix memleak found by torture test by releasing the `bufref`
structure in `unit_stop()` that was allocated in `unit_setup()`.
```
test 1661...[bufref unit tests]
Leak detected: memory still allocated: 13 bytes
allocated by /home/runner/work/curl/curl/tests/unit/unit1661.c:70
1661: torture FAILED: function number 1 in test.
```
Ref: https://github.com/curl/curl/actions/runs/10967279334/job/30456745290?pr=14772#step:8:41

Similar test suite builds with autotools default and cmake+bundle+unity:
- GHA/Linux: 33s vs 7s
https://github.com/curl/curl/actions/runs/10705668823/job/29681617374
- GHA/macOS 34s vs 2s
https://github.com/curl/curl/actions/runs/10705668813/job/29681632885
- GHA/FreeBSD: 15m25 vs 6m21 (full workflow time, ~qemu)
https://github.com/curl/curl/actions/runs/10705668811/job/29681607915
- GHA/Cygwin: 9m52 vs 32s
https://github.com/curl/curl/actions/runs/10705668809/job/29681609965
- GHA/MSYS2: 3m52 vs 14s
https://github.com/curl/curl/actions/runs/10705668808/job/29681624295
- GHA/mingw-w64: 5m45 vs 30s
https://github.com/curl/curl/actions/runs/10705668808/job/29681628787

Autotools test suite builds compared between master -> `--enable-test-bundles`:
- GHA/Linux: 33s -> 9s (run tests: 22m23 -> 20m44)
https://github.com/curl/curl/actions/runs/10710030193/job/29695932185
https://github.com/curl/curl/actions/runs/10967831456/job/30458220344
- GHA/macOS: 25s -> 4s (run tests: 2m58 -> 2m24)
https://github.com/curl/curl/actions/runs/10710030195/job/29695938444
https://github.com/curl/curl/actions/runs/10967831452/job/30458225762
- GHA/non-native (FreeBSD): 4m8 -> 3m12 (full workflow time, ~qemu)
https://github.com/curl/curl/actions/runs/10710030198/job/29695928401
https://github.com/curl/curl/actions/runs/10967831458/job/30458212692
- GHA/Cygwin: 9m25 -> 1m9 (run tests: 9m19 -> 3m28)
https://github.com/curl/curl/actions/runs/10710030212/job/29695928213
https://github.com/curl/curl/actions/runs/10967831453/job/30458213268
- GHA/MSYS2: 3m54 -> 32s (run tests: 6m3 -> 3m59)
https://github.com/curl/curl/actions/runs/10710030190/job/29704850591
https://github.com/curl/curl/actions/runs/10967831449/job/30459280005
- GHA/mingw-w64: 5m42 -> 1m5 (run tests: 7m41 -> 5m36)
https://github.com/curl/curl/actions/runs/10710030190/job/29704852058
https://github.com/curl/curl/actions/runs/10967831449/job/30459280862
- Azure MSYS2 mingw64 openssl: 38m55 -> 11m58
https://dev.azure.com/daniel0244/curl/_build/results?buildId=25546&view=logs&j=b58b8c59-0f61-52e9-0f9e-fad562a1e77f&t=0f9230a7-3b10-53ca-9938-700ece377c5e
https://dev.azure.com/daniel0244/curl/_build/results?buildId=25547&view=logs&jobId=39473db1-3945-55d5-deb5-c218fad88dce&j=b58b8c59-0f61-52e9-0f9e-fad562a1e77f&t=0f9230a7-3b10-53ca-9938-700ece377c5e
- Azure Ubuntu default: 2m15 -> 55s (all build)
https://dev.azure.com/daniel0244/curl/_build/results?buildId=25546&view=logs&j=9d58b9ac-e1e6-53b6-f83a-1f9f1d912522&t=a6b38d83-e7cf-5a9b-c762-a178412717b7
https://dev.azure.com/daniel0244/curl/_build/results?buildId=25547&view=logs&jobId=39473db1-3945-55d5-deb5-c218fad88dce&j=9d58b9ac-e1e6-53b6-f83a-1f9f1d912522&t=a6b38d83-e7cf-5a9b-c762-a178412717b7

Cmake test suite builds compared between master -> `-DCURL_TEST_BUNDLES=ON` + unity:
- GHA/Linux: 29s -> 7s (run tests: 4m50 -> 4m57, 20m43 -> 20m45)
https://github.com/curl/curl/actions/runs/10710030193/job/29695941814
https://github.com/curl/curl/actions/runs/10705668823/job/29681622201
- GHA/Linux old: 44s -> 13s (bundle+no unity) (run tests: 5m5 -> 5m6)
https://github.com/curl/curl/actions/runs/10718264094/job/29719794727
https://github.com/curl/curl/actions/runs/10718653175/job/29721009613
- GHA/macOS: 32s -> 2s (run tests: 2m43 -> 2m40)
https://github.com/curl/curl/actions/runs/10710030195/job/29695931956
https://github.com/curl/curl/actions/runs/10705668813/job/29681638937
- GHA/non-native (*BSD): inconclusive (full workflow time, ~qemu)
https://github.com/curl/curl/actions/runs/10710030198
https://github.com/curl/curl/actions/runs/10705668811
- GHA/Cygwin: 3m9 -> 32s
https://github.com/curl/curl/actions/runs/10710030212/job/29695929075
https://github.com/curl/curl/actions/runs/10705668809/job/29681609965
- GHA/MSYS2: 2m24 -> 14s
https://github.com/curl/curl/actions/runs/10710030190/job/29704850996
https://github.com/curl/curl/actions/runs/10705668808/job/29681624295
- GHA/mingw-w64: 3m56 -> 30s (run tests: 4m2 -> 3m52)
https://github.com/curl/curl/actions/runs/10710030190/job/29704852219
https://github.com/curl/curl/actions/runs/10705668808/job/29681631393
- GHA/mingw-w64-old: 7m19 -> 1m44 (run tests: 3m30 -> 2m53)
https://github.com/curl/curl/actions/runs/10710030190/job/29704849763
https://github.com/curl/curl/actions/runs/10705668808/job/29681622329
- GHA/MSVC: 3m22 -> 13s (run tests: 9m43 -> 4m22)
https://github.com/curl/curl/actions/runs/10710030190/job/29704850411
https://github.com/curl/curl/actions/runs/10705668808/job/29681623313
- AppVeyor CI MSVC 2008: 4m3 -> 45s (full build)
- AppVeyor CI MSVC 2010: 2m56 -> 1m8 (full build)
- AppVeyor CI MSVC 2022: 10m19 -> 2m23 (full build)
https://ci.appveyor.com/project/curlorg/curl/builds/50538455
https://ci.appveyor.com/project/curlorg/curl/builds/50536558
- AppVeyor CI total build time: 10m30 (master) -> 6m48 (unity) -> 4m5 (bundle) -> 3m24 (bundle+unity) -> 5m7 (bundle+unity+all jobs building tests)

Closes #14772

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autotools: add support for 'unity' builds, enable in CI

Implement the "unity" builds as known from CMake, but for autotools.
It's limited to `lib` and `src` (CMake also supports it in `t

autotools: add support for 'unity' builds, enable in CI

Implement the "unity" builds as known from CMake, but for autotools.
It's limited to `lib` and `src` (CMake also supports it in `tests`).

Enable with: `--enable-unity` (disabled by default)

Unity builds speed up builds significantly. Cygwin and Windows builds in
particular, but the effect is noticeable on most systems. It also allows
discovering unity issues with autotools, benefitting also CMake when
building the same combination. In CI it makes turnaround times quicker.

This closes build performance with CMake. autotools still lags behind
because it builds shared and static libcurl in two, separate passes.
CMake does it in one. Manpage compilation isn't batched, it is in CMake.
After unity and test bundle support the slowest parts of the build are
the configuration phase (which is effectively a tedious, non-parallel,
compilation and/or linking of 300+ tiny programs. The next bottleneck
is compiling individual examples and finally test servers (only slow
with autotools).

The autotools implementation is slightly less efficient than CMake,
because 3 sources are permanently excluded while in CMake this isn't
necessary and solved more efficiently while building libtests. There is
also no 'unity' support for tests, making them a less efficient also.

Enable it in CI for most `configure` jobs. Except in GHA/dist (though
it works fine there too), to use the default config there. Also skip for
the Linux AWC-LC job where it made builds time a few seconds longer
(reason undiscovered.)

Autotools test suite builds compared between master -> `--enable-unity`:
- GHA/Linux: 32s -> 12s
https://github.com/curl/curl/actions/runs/10705668823/job/29681617374
https://github.com/curl/curl/actions/runs/10742978889/job/29796766297
- GHA/macOS: 37s -> 10s
https://github.com/curl/curl/actions/runs/10705668813/job/29681632885
https://github.com/curl/curl/actions/runs/10742978699/job/29796768875
- GHA/FreeBSD: 15m25 -> 10m58 (full workflow time, ~qemu)
https://github.com/curl/curl/actions/runs/10705668811/job/29681607915
https://github.com/curl/curl/actions/runs/10742978937/job/29796766115
- GHA/Cygwin: 3m32 -> 1m21
https://github.com/curl/curl/actions/runs/10705668809/job/29681609965
https://github.com/curl/curl/actions/runs/10742978645/job/29796756933
- GHA/MSYS2: 2m42 -> 50s
https://github.com/curl/curl/actions/runs/10705668808/job/29681621166
https://github.com/curl/curl/actions/runs/10742978662/job/29799739289
- GHA/mingw-w64: 5m32 -> 1m23
https://github.com/curl/curl/actions/runs/10705668808/job/29681628787
https://github.com/curl/curl/actions/runs/10742978662/job/29799741568

Closes #14815

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cmake: separate target for examples, optimize CI, fix fallouts

- Move `docs/examples` builds under a separate target.

- Make `BUILD_EXAMPLES` default to `ON`. It means to generate t

cmake: separate target for examples, optimize CI, fix fallouts

- Move `docs/examples` builds under a separate target.

- Make `BUILD_EXAMPLES` default to `ON`. It means to generate the rules
for `docs/examples` by default, but not build them. To build them,
an explicit `make curl-examples` (or ninja, etc) command is necessary.
This syncs behaviour with autotools, and also how both cmake and
autotools are building tests.

- GHA: update cmake jobs to use the new way of building examples.

- GHA: move examples build step at the end of the job, after building
and running tests. This allows to have build and test run results
faster, and leave the seldom-changing examples build to the end.
Building examples is the slowest build step with no practical way to
make them fast.

- appveyor: enable building examples in two old-MSVC jobs.

- examples: fix examples to build cleanly with old MSVC versions.

- GHA/non-native: move example build log under a GHA foldable section.

- GHA/windows: move building examples into separate step for Linux cross
jobs.

Follow-up to dfdd978f7c60224dffe2aac25b436dc0a5cd0186 #13491
Closes #14906

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GHA/windows: add MSVC vcpkg MSH3 job

Refs: #14927 #14932 #14971
Closes #14922

GHA/windows: revert enabling SSPI option

Because it reduces test coverage significantly:
```
TESTINFO: "curl has SSPI support" 109 times (64, 65, 67, 68, 69, 70, 72, 81, 88 and 100 m

GHA/windows: revert enabling SSPI option

Because it reduces test coverage significantly:
```
TESTINFO: "curl has SSPI support" 109 times (64, 65, 67, 68, 69, 70, 72, 81, 88 and 100 more)
```

Follow-up to e53523fef07894991c69d907a7c7794c7ada4ff4 #14859
Closes #14947

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GHA/windows: fix bad typo in MSVC GnuTLS stunnel condition

Regression from e53523fef07894991c69d907a7c7794c7ada4ff4 #14859

GHA: misc updates: impacket, timeouts, mingw-w64 32-bit

- NetBSD: enable impacket. Debatable if this hefty package is worth it
for the single SMB test (1451) run curl uses it for.

GHA: misc updates: impacket, timeouts, mingw-w64 32-bit

- NetBSD: enable impacket. Debatable if this hefty package is worth it
for the single SMB test (1451) run curl uses it for.
(on the upside, it seems to install instantly on NetBSD)
It's also a versioned package name that requires active maintenance.
The unversioned name doesn't work, though that's what the package
search returns: https://pkgsrc.se/net/py-impacket

- FreeBSD: stop installing impacket deps explicitly.
They are automatically installed via the impacket package.

- Linux: put time limit on test runs.
Started hanging yesterday:
linux: https://github.com/curl/curl/actions/runs/10875011573/job/30172946986#step:41:3731
awslc: https://github.com/curl/curl/actions/runs/10879782864/job/30185188509
wolfssl: https://github.com/curl/curl/actions/runs/10879782864/job/30185188509

- distcheck: reduce time limit to 15m (was 30m)
Linux tests started to hang, so reduce the timeout from 30 minutes
to 15. These jobs normally take 3 to 6 minutes to finish.
https://github.com/curl/curl/actions/runs/10879479914

- Windows: add 32-bit MSYS2/mingw-w64 job.
Follow-up to e53523fef07894991c69d907a7c7794c7ada4ff4 #14859

Closes #14929

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CI: move Azure jobs to GHA, fix fallouts, sshserver, runtests tweaks

CI:

- GHA/windows: enable OpenSSH server, SysInternals `handle`, `impacket`.
Skip `impacket` on MSYS2 due

CI: move Azure jobs to GHA, fix fallouts, sshserver, runtests tweaks

CI:

- GHA/windows: enable OpenSSH server, SysInternals `handle`, `impacket`.
Skip `impacket` on MSYS2 due to install failure.
Skip OpenSSH server for old/standalone mingw-w64 (building curl
without SSH there.)
- GHA/windows: make test tool installs a separate step.
- GHA/cygwin: enable OpenSSH server.
Skip `impacket`: it's compiling for 7 minutes then breaks.
Skip `stunnel` due to sluggish test run performance.
(This update is unrelated to Azure jobs.)
- GHA/linux: migrate Linux jobs from Azure CI.
- GHA/linux: migrate scanbuild job from Azure CI.
- GHA/linux: enable libssh2 in a job. Also enable valgrind.
- CI/windows: enable SSPI in two jobs.
- CI/windows: disable zlib in one more job.
- CI/windows: improve `if` condition checking GnuTLS.
- CI/windows: ignore SFTP/SCP tests as necessary.
- universally ignore SCP tests, they fail everywhere.
- ignore test 612.
- ignore test 613 616 618 with MSYS2 mingw-w64.
- ignore test 614 with libssh.
- ignore all SFTP with MSYS2 native.
- ignore all SFTP with vcpkg with `libssh2[core,zlib]`.
- ignore a couple of SFTP tests with MSYS2 mingw-w64.
(This matches settings on Azure CI.)
- GHA/windows: ignore failing 1451 'Basic SMB request' test for
old mingw-w64 7.3.0 (but not for 9.5.0!):
```
2024-09-11 21:45:59,738 ERROR smbComNegotiate: b'NT LM 0.12\x00' is not in list
[...]
curl: (7) Could not connect to server
[...]
FAIL 1451: 'Basic SMB request' SMB
```
Ref: https://github.com/curl/curl/actions/runs/10816280746/job/30007130770#step:13:3546
- CI/Azure: delete, now moved to GHA.

sshserver:

- sshserver: fix permissions for SSH host key on Windows, allowing sshd
to launch.
- sshserver: fix initializing config paths with Cygwin/MSYS2 sshd.
- sshserver: fix initializing config paths in parallel builds.
- sshserver: delete redundant `DenyUsers`. This also opens the way
to allow multiple usernames.
- sshserver: fix `AllowUsers` for GHA/windows, by allowing the
domainless username again.
Follow-up to 3ee7c676ec8ef32e3a9cb4d0fb2929a8335d58db #5721
- sshserver: fix `Deprecated option` warnings in `sshd_config`:
```
D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 7: Deprecated option AuthorizedKeysFile2
D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 25: Deprecated option KeyRegenerationInterval
D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 35: Deprecated option RhostsRSAAuthentication
D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 36: Deprecated option RSAAuthentication
D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 37: Deprecated option ServerKeyBits
D:/a/curl/curl/bld/tests/log/2/server/curl_sshd_config line 41: Deprecated option UseLogin
```
- sshserver: fix `Deprecated option` warnings in `ssh_config` with
Cygwin/MSYS2.
- sshserver: fix dumping config files due to the filenames missing their
full paths.
- sshserver: add workaround to make `logmsg` messages visible.
Before this patch they only went to a file and never shown.

runtests:

- runtests: log details when these Windows commands are called:
`handle`, `taskkill`, `tasklist`.
- runtests: add documentation links to Windows tools:
`handle`, `taskkill`, `tasklist`, `icacls`.
- runtests: add `-t` (kill whole tree) option to `taskkill` in
`servers.pm`, syncing it with the other `taskkill` call.
Follow-up to bc72a78a11764558639131d51fa8e7c81ee1e113 #14488
- runtests: show warning if Sysinternals `handle` tool is missing.
- runtests: drop Windows XP Home compatibility `tskill` call.
The call was made on all Windows versions. It's possibly overkill to
do this, because XP Home is probably rarely used for running curl
tests these days. In case it's needed, it'd be better to put it under
an explicit option.
- runtests: show Perl version and path.

Fix/silence fallouts:

- unit2603: fix building with disabled HTTP support.
- unit2604: silence `-Woverlength-strings` warnings in C89 mode.
- test437, test1614: fix to pass with no-IPv6 builds.

Closes #14859

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GHA: replace make with ninja in Cygwin, MSYS2 and mingw-w64 cmake jobs

Speed-ups:
- cygwin build: 47s -> 29s
- cygwin build tests: 3m12 -> 2m32
- MSYS2 native build: 29s -> 16s

GHA: replace make with ninja in Cygwin, MSYS2 and mingw-w64 cmake jobs

Speed-ups:
- cygwin build: 47s -> 29s
- cygwin build tests: 3m12 -> 2m32
- MSYS2 native build: 29s -> 16s
- MSYS2 native build tests: 2m24 -> 1m52
- MSYS2/mingw-w64: already had ninja installed and used implicitly.
- linux-mingw-w64-cross: 31s -> 25s

before:
cygwin: https://github.com/curl/curl/actions/runs/10866939355/job/30155134299
windows: https://github.com/curl/curl/actions/runs/10866939361

after:
cygwin: https://github.com/curl/curl/actions/runs/10867861215/job/30157121784
windows: https://github.com/curl/curl/actions/runs/10867861208?pr=14914

Closes #14914

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GHA/windows: use libuv for event-based tests on openssl job

Use libuv for event-based tests on openssl job.

Closes #14868

GHA/windows: re-add GnuTLS after upstream fix

Re-add GnuTLS. The fix was in this PR:
https://github.com/microsoft/vcpkg/pull/40739

Follow-up to a5682d9cb9da3212775bb227488a343d3

GHA/windows: re-add GnuTLS after upstream fix

Re-add GnuTLS. The fix was in this PR:
https://github.com/microsoft/vcpkg/pull/40739

Follow-up to a5682d9cb9da3212775bb227488a343d32552fd6 #14710
Closes #14864

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GHA/windows: raise test run timeouts

Give more time for recently enabled TLS tests to complete.

Follow-up to bc72a78a11764558639131d51fa8e7c81ee1e113 #14488
Ref: #14849
Clos

GHA/windows: raise test run timeouts

Give more time for recently enabled TLS tests to complete.

Follow-up to bc72a78a11764558639131d51fa8e7c81ee1e113 #14488
Ref: #14849
Closes #14851

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autotools: settle with option name: `--enable-windows-unicode`

Bring the option name style in sync with cmake and with other configure
options aiming to enable something unrelated to an

autotools: settle with option name: `--enable-windows-unicode`

Bring the option name style in sync with cmake and with other configure
options aiming to enable something unrelated to an optional package.

(I initially named this new option `--with-windows-unicode` within this
release cycle.)

Follow-up to 9e4a2187e763dd80a1296b07fd3e073f46c4dc8f #14478

Closes #14746

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GHA/windows: vcpkg GnuTLS started breaking CI, temp drop it

Starting today vcpkg wants to rebuild GnuTLS but fails:
```
error: building shiftmedia-libgnutls:x64-windows failed with:

GHA/windows: vcpkg GnuTLS started breaking CI, temp drop it

Starting today vcpkg wants to rebuild GnuTLS but fails:
```
error: building shiftmedia-libgnutls:x64-windows failed with: BUILD_FAILED
```
Ref: https://github.com/curl/curl/actions/runs/10594890318/job/29359499149#step:5:144

Temporary solution:
- drop it from the MultiSSL job.
- replace with mbedTLS job. This job still tests libssh and I could
not find a better place for it right away.

GnuTLS to be restored once it builds again. Possibly when this hash
reaches the GHA `windows-latest` runner:
https://github.com/microsoft/vcpkg/commit/f5ec6f30ff70f04f841436a0f36600bdbabfcfbf

Also:
- switch to Debug for the mbedTLS job. Should also work now with
GnuTLS, once it's back:
Ref: https://github.com/microsoft/vcpkg/pull/40473

Closes #14710

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CI: add test timeouts, more cmake build tests, fix VS2010 C warning

- GHA/macos: set timeout for test runs.
Double the value for autotools to fit torture tests.
- GHA/cygwin: reduc

CI: add test timeouts, more cmake build tests, fix VS2010 C warning

- GHA/macos: set timeout for test runs.
Double the value for autotools to fit torture tests.
- GHA/cygwin: reduce test run timeout for autotools.
- GHA/cygwin: enable building tests with cmake.
- GHA/windows: enable building tests with MSYS cmake.
- GHA/windows: enable building tests with MSVC UWP.
- appveyor: enable building tests with VS2008 x86 and VS2010 x64.
- tests: add workaround compiler warnings when building with VS2010:
```
tests\server\util.c(482): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
tests\server\util.c(486): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
tests\server\util.c(490): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
tests\server\util.c(720): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
tests\server\util.c(726): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
tests\server\util.c(732): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
tests\server\util.c(781): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
tests\server\util.c(785): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
tests\server\util.c(789): warning C4306: 'type cast' : conversion from 'int' to 'void (__cdecl *)(int)' of greater size
```
Ref: https://ci.appveyor.com/project/curlorg/curl/builds/50485633/job/4ujlwxod3cexmn2q#L1535

With this, tests are built in all GHA cygwin/windows jobs.

Timeouts avoid long runs with runaway issues, example:
https://github.com/curl/curl/actions/runs/10575522173

Closes #14700

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configure: fix WinIDN builds targeting old Windows

1. GHA/windows: enable WinIDN in Linux cross-builds.
(to reveal the issue in CI.)

2. fix compiler warning when building wit

configure: fix WinIDN builds targeting old Windows

1. GHA/windows: enable WinIDN in Linux cross-builds.
(to reveal the issue in CI.)

2. fix compiler warning when building with mingw-w64 supporting
WinIDN, while targeting pre-Vista Windows, with a `WINVER` set to
target Vista or newer. (Such was Ubuntu's mingw-w64 with the
classic-mingw-specific trick in point 3 of this PR.)
```
../../lib/idn.c:154:23: error: redundant redeclaration of ‘IdnToAscii’ [-Werror=redundant-decls]
154 | WINBASEAPI int WINAPI IdnToAscii(DWORD dwFlags,
| ^~~~~~~~~~
In file included from /usr/share/mingw-w64/include/windows.h:73,
from /usr/share/mingw-w64/include/winsock2.h:23,
from ../../lib/setup-win32.h:91,
from ../../lib/curl_setup.h:308,
from ../../lib/idn.c:29:
/usr/share/mingw-w64/include/winnls.h:1075:30: note: previous declaration of ‘IdnToAscii’ was here
1075 | WINNORMALIZEAPI int WINAPI IdnToAscii (DWORD dwFlags, LPCWSTR lpUnicodeCharStr, int cchUnicodeChar, LPWSTR lpASCIICharStr, int cchASCIIChar);
| ^~~~~~~~~~
[...same for IdnToUnicode...]
```
Ref: https://github.com/curl/curl/actions/runs/10542832783/job/29210098553#step:7:89

3. drop `WINVER` override for classic-mingw. curl no longer supports
building with classic-mingw.
Reverts 37f1c21cb9c809ec870803fc40e1ed2afd9534ac #7581

4. sync `if IdnToUnicode can be linked` detection snippet with the live
code in `lib/idn.c`. It fixes detection for the scenario in point 2.

5. delete unused `WINIDN_DIR` variable.

Bug: https://github.com/curl/curl/pull/12606#issuecomment-1885381038
Previous abandoned attempt: #12684
Reviewed-by: Jay Satiro
Closes #14680

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GHA/windows: enable HTTPS tests with stunnel

- install stunnel

Closes #14488

GHA/windows: add Linux -> mingw-w64 cross-build (cmake, autotools)

Also:
- add a line to CMake log output showing the host and target OS and CPU
when doing cross-builds.
- redu

GHA/windows: add Linux -> mingw-w64 cross-build (cmake, autotools)

Also:
- add a line to CMake log output showing the host and target OS and CPU
when doing cross-builds.
- reduce excessive timeout for `curl -V` steps.

Closes #14661

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GHA: add yamlcheck

Uses `yamllint`.

Also:
- fix warning for existing YAML files:
```
[truthy] truthy value should be one of [false, true]
```

Closes #

GHA: add yamlcheck

Uses `yamllint`.

Also:
- fix warning for existing YAML files:
```
[truthy] truthy value should be one of [false, true]
```

Closes #14650

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GHA/windows: fix indentation in the MSVC section