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

show more ...

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/non-native: bump vmactions/omnios-vm from 1.0.2 to 1.0.6

Bumps [vmactions/omnios-vm](https://github.com/vmactions/omnios-vm) from 1.0.2 to 1.0.6.
- [Release notes](https://github.com

GHA/non-native: bump vmactions/omnios-vm from 1.0.2 to 1.0.6

Bumps [vmactions/omnios-vm](https://github.com/vmactions/omnios-vm) from 1.0.2 to 1.0.6.
- [Release notes](https://github.com/vmactions/omnios-vm/releases)
- [Commits](https://github.com/vmactions/omnios-vm/compare/a61ca1ebafdcb14a9d986928d070c9834ee66fd3...2f97978b477e0a014767f65ecf3656b933541460)

show more ...

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/non-native: install Perl for FreeBSD cmake jobs

It was implicitly installed for autotools jobs. Install it explicitly
for cmake ones.

Closes #14928

GHA/non-native: enable SFTP/SCP tests on FreeBSD

It's working now. Possibly fixed in the runner env?

Closes #14920

GHA/non-native: replace make with ninja in cmake jobs

Comparing job times for non-native runners is unreliable, but
a speed-up is expected nonetheless.

Full job times:
- Net

GHA/non-native: replace make with ninja in cmake jobs

Comparing job times for non-native runners is unreliable, but
a speed-up is expected nonetheless.

Full job times:
- NetBSD amd64: 14m1 -> 13m15
- OpenBSD amd64: 6m14 -> 5m33
- FreeBSD arm64: 6m10 -> 5m32

Example runs:
before: https://github.com/curl/curl/actions/runs/10866939368
after: https://github.com/curl/curl/actions/runs/10870425491?pr=14917

Closes #14917

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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/non-native: ignore FTP results in OpenBSD job

They are flaky.

GHA/non-native: ignore FreeBSD FTP test results

They are flaky.

CI: realign cmake build settings (for nghttp2, libidn2)

- nghttp2 is now on by default, adjust build configuration accordingly.
Follow-up to 87aa4ebd821ebae0023df8658360c724efcf5e00 #1

CI: realign cmake build settings (for nghttp2, libidn2)

- nghttp2 is now on by default, adjust build configuration accordingly.
Follow-up to 87aa4ebd821ebae0023df8658360c724efcf5e00 #14136

- GHA/macos: disable libidn2 in combination builds, syncing with
autotools. Otherwise it's now auto-detected via pkg-config by default.
Follow-up to f43adc2c4978f7f82a359e89186e58a31d17b0ad #14137

Closes #14364

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GHA/non-native: reduce FreeBSD test parallelism to -j8 [ci skip]

To reduce flakiness.

GHA/non-native: bump FreeBSD/arm64 python modules

FreeBSD seems to upgrade their Python separately for arm64
and Intel. Today, arm64 caught up with the Intel packages.
Update our CI

GHA/non-native: bump FreeBSD/arm64 python modules

FreeBSD seems to upgrade their Python separately for arm64
and Intel. Today, arm64 caught up with the Intel packages.
Update our CI to reflect it.

Closes #14310

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GHA/non-native: improve, migrate x86_64 FreeBSD with tests from Cirrus CI

- run tests via `make test-ci` instead of `make check` with autotools.
- add `x86_64` job for FreeBSD, with test

GHA/non-native: improve, migrate x86_64 FreeBSD with tests from Cirrus CI

- run tests via `make test-ci` instead of `make check` with autotools.
- add `x86_64` job for FreeBSD, with tests.
It matches the existing Cirrus CI job, with these differences:
- finishes 3x faster (thanks to parallel tests enabled).
- librtmp is not enabled because it's slated for removal by FreeBSD.
(already past the removal deadline, thought the package still
installs.)
- DICT and TELNET servers fail to start. Couldn't figure out why.
It means skipping test 1450 and 1452.
- it runs more tests, e.g. websockets and ip6-localhost.
- no `pkg update -f`.
- it misses the `CRYPTOGRAPHY_DONT_BUILD_RUST=1`, `pkg delete curl`,
`chmod 777`, `sudo -u nobody` and `sysctl net.inet.tcp.blackhole`
tricks. The latter is the default in these runners, the others did
not affect results.
- set `-j0` for tests in the NetBSD job. Flaky otherwise.

Closes #14244

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GHA: FreeBSD 14.1, actions bump

- bump FreeBSD to 14.1

- update cross-platform-actions/action action to v0.25.0

Closes #14157
Closes #14164

cmake: detect `libidn2` also via `pkg-config`

Also:
- GHA/non-native: install `pkg-config` to detect libidn2 with cmake
on NetBSD and FreeBSD.
- GHA/non-native: tidy-up `curl -

cmake: detect `libidn2` also via `pkg-config`

Also:
- GHA/non-native: install `pkg-config` to detect libidn2 with cmake
on NetBSD and FreeBSD.
- GHA/non-native: tidy-up `curl --version` command if here.

Cherry-picked from #14097
Closes #14137

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GHA: update pinned actions

- github/codeql-action digest to 23acc5c
- actions/checkout digest to 692973e
- rojopolis/spellcheck-github-actions digest to d354a4d

Closes #1393

GHA: update pinned actions

- github/codeql-action digest to 23acc5c
- actions/checkout digest to 692973e
- rojopolis/spellcheck-github-actions digest to d354a4d

Closes #13935
Closes #13945
Closes #13946

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GHA: show cmake error log in Windows and non-native workflows

CMake configure doesn't fail often, but when it does, it helps to see
its `CMakeFiles/CMakeConfigureLog.yaml` output. This f

GHA: show cmake error log in Windows and non-native workflows

CMake configure doesn't fail often, but when it does, it helps to see
its `CMakeFiles/CMakeConfigureLog.yaml` output. This file is present
since CMake v3.26:
https://cmake.org/cmake/help/v3.26/manual/cmake-configure-log.7.html

(Older CMake versions save similar contend to
`CMakeFiles\CMakeOutput.log` and
`CMakeFiles\CMakeError.log`. This patch doesn't deal with that because
the workflows touched are all running a newer CMake.)

After this patch, we dump the content if cmake fails. Syncing this with
autotools, where we already did that.

Closes #13872

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GHA: use ubuntu-latest with OmniOS job

It's the same as ubuntu-22.04.

Also update OmniOS package search link.

Closes #13831

ci: update vmactions/omnios-vm digest to a61ca1e

Closes #13801

GHA: ignore flaky MQTT and FTP test results [ci skip]

MQTT / OmniOS:
```
TESTFAIL: These test cases failed: 1190 1198 3017
```
Ref: https://github.com/curl/curl/actions/runs/

GHA: ignore flaky MQTT and FTP test results [ci skip]

MQTT / OmniOS:
```
TESTFAIL: These test cases failed: 1190 1198 3017
```
Ref: https://github.com/curl/curl/actions/runs/9258522297/job/25468730731?pr=13694#step:3:10251

MQTT / OmniOS:
```
TESTFAIL: These test cases failed: 1194 2200 2203 2205
```
Ref: https://github.com/curl/curl/actions/runs/9150523540/job/25155409832#step:3:10233

FTP / OmniOS:
```
TESTFAIL: These test cases failed: 1096
```
Ref: https://github.com/curl/curl/actions/runs/9150702711/job/25155793948#step:3:10247

FTP / OmniOS:
```
TESTFAIL: These test cases failed: 381
```
Ref: https://github.com/curl/curl/actions/runs/9163863822/job/25193897640#step:3:10230

FTP / OmniOS:
```
TESTFAIL: These test cases failed: 340
```
Ref: https://github.com/curl/curl/actions/runs/9233804752/job/25406671742?pr=13771#step:3:10245

Ref: https://github.com/curl/curl/pull/13583#issuecomment-2119376898

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GHA: ignore flaky test 3017 (MQTT) on OpenBSD

```
TESTFAIL: These test cases failed: 3017
```
Ref: https://github.com/curl/curl/actions/runs/9223543272/job/25376999226?pr=13759#s

GHA: ignore flaky test 3017 (MQTT) on OpenBSD

```
TESTFAIL: These test cases failed: 3017
```
Ref: https://github.com/curl/curl/actions/runs/9223543272/job/25376999226?pr=13759#step:3:16326
Ref: https://github.com/curl/curl/actions/runs/9230183764/job/25397883193?pr=13766#step:3:16345

Ref: https://github.com/curl/curl/pull/13583#issuecomment-2119376898

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