pytest: fixes for recent python, add FTP tests

Fixes:
- in uds tests, abort also silently on os errors
- be conservative on the h3 goaway duration
- detect curl debug build and u

pytest: fixes for recent python, add FTP tests

Fixes:
- in uds tests, abort also silently on os errors
- be conservative on the h3 goaway duration
- detect curl debug build and use in checks
- fix caddy version check for slight difference under linux
- set caddy default path fitting for linux
- fix deprecation warnings in valid time checks

FTP tests:
- add '--with-test-vsftpd=path' to configure
- use vsftpd default path suitable for linux
- add test_30 with plain FTP tests
- add test_31 with --ssl-reqd FTP tests
- add vsftpd to linux GHA for pytest workflows

Closes #13661

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GHA: pin dependencies

Closes #13628

ci: update libressl-portable/portable to v3.9.2

Closes #13649

ci: handle git submodules for mbedTLS

Add the remainder of the workflows

Add some basic versioning for some workflows to check whether this is detected properly

ci: remove microsoft-prod.list

This is added by default, and it is often broken, but we don't need
anything from it.

Closes #13473

CI: update component versions

- ngtcp2: v1.4.0
- nghttp3: v1.2.0
- nghttp2: v1.61.0
- mod_h2: v2.0.27

Closes #13316

deps: update librustls 0.12.0 -> 0.13.0

This commit updates the optional rustls-ffi librustls dependency from
0.12.0 to 0.13.0. This version is based on the latest available rustls
r

deps: update librustls 0.12.0 -> 0.13.0

This commit updates the optional rustls-ffi librustls dependency from
0.12.0 to 0.13.0. This version is based on the latest available rustls
release (0.23.4).

The breaking API changes from 0.12.0 to 0.13.0 are in API surface unused
by curl, so this is an in-place update without any code changes.

The `RUSTLS.md` documentation is updated to reflect the new version in
use, and to clarify that `cbindgen` isn't required to build `librustls`
- it's only used by developers to update the vendored `rustls.h` header
file maintained upstream.

Closes #13238

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GHA/linux: add sysctl trick to work-around GitHub runner issue

The GitHub image runner update from 20240304.1.0 to 20240310.1
introduces a problem for clang-14. The issue is caused by

GHA/linux: add sysctl trick to work-around GitHub runner issue

The GitHub image runner update from 20240304.1.0 to 20240310.1
introduces a problem for clang-14. The issue is caused by
incompatibility between llvm 14 provided in ubuntu-22.04 image and the
much newer kernel configured with high-entropy ASLR.

As a work-around, we issue a sysctl command to lower the entropy and get
clang-14 to work again.

URL: https://github.com/actions/runner-images/issues/9491

Closes #13124

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rustls: make curl compile with 0.12.0

Closes #12989

GHA: bump ngtcp2, gnutls, mod_h2, quiche

- ngtcp2 to v1.2.0
- gnutls to 3.8.3
- mod_h2 to 2.0.26
- quiche to 0.20.0

Closes #12778
Closes #12779
Closes #12780

GHA: bump ngtcp2, gnutls, mod_h2, quiche

- ngtcp2 to v1.2.0
- gnutls to 3.8.3
- mod_h2 to 2.0.26
- quiche to 0.20.0

Closes #12778
Closes #12779
Closes #12780
Closes #12781

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CI: remove unnecessary OpenSSL 3 option `enable-tls1_3`

.. and switch OpenSSL 3 libdir from lib64 to lib for consistency.

Closes https://github.com/curl/curl/pull/12758

CI: bump actions/cache from 3 to 4

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](htt

CI: bump actions/cache from 3 to 4

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](https://github.com/actions/cache/compare/v3...v4)

---
updated-dependencies:
- dependency-name: actions/cache
dependency-type: direct:production
update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Closes #12756

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CI: install libpsl or configure --without-libpsl in builds

As a follow-up to the stricted libpsl check in configure

appveyor: replace PowerShell with bash + parallel autotools

PowerShell works (after a steep development curve), but one property of
it stuck and kept causing unresolvable usability issue

appveyor: replace PowerShell with bash + parallel autotools

PowerShell works (after a steep development curve), but one property of
it stuck and kept causing unresolvable usability issues: With
`$ErrorActionPreference=Stop`, it does abort on failures, but shows only
the first line of the error message. In `Continue` mode, it shows the
full error message, but doesn't stop on all errors. Another issue is
PowerShell considering any stderr output as if the command failed (this
has been improved in 7.2 (2021-Nov), but fixed versions aren't running
in CI and will not be for a long time in all test images.)

Thus, we're going with bash.

Also:
- use `-j2` with autotools tests, making them finish 5-15 minutes per
job faster.
- omit `POSIX_PATH_PREFIX`.
- use `WINDIR`.
- prefer forward slashes.

Follow-up to: 75078a415d9c769419aed4153d3d525a8eba95af #11999
Ref: #12444

Fixes #12560
Closes #12572

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build: fix some `-Wsign-conversion`/`-Warith-conversion` warnings

- enable `-Wsign-conversion` warnings, but also setting them to not
raise errors.
- fix `-Warith-conversion` warni

build: fix some `-Wsign-conversion`/`-Warith-conversion` warnings

- enable `-Wsign-conversion` warnings, but also setting them to not
raise errors.
- fix `-Warith-conversion` warnings seen in CI.
These are triggered by `-Wsign-converion` and causing errors unless
explicitly silenced. It makes more sense to fix them, there just a few
of them.
- fix some `-Wsign-conversion` warnings.
- hide `-Wsign-conversion` warnings with a `#pragma`.
- add macro `CURL_WARN_SIGN_CONVERSION` to unhide them on a per-build
basis.
- update a CI job to unhide them with the above macro:
https://github.com/curl/curl/actions/workflows/linux.yml -> OpenSSL -O3

Closes #12492

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tidy-up: fix yamllint whitespace issues

Closes #12466

autotools: stop setting `-std=gnu89` with `--enable-warnings`

Do not alter the C standard when building with `--enable-warnings` when
building with gcc.

On one hand this alters

autotools: stop setting `-std=gnu89` with `--enable-warnings`

Do not alter the C standard when building with `--enable-warnings` when
building with gcc.

On one hand this alters warning results compared to a default build.
On the other, it may produce different binaries, which is unexpected.

Also fix new warnings that appeared after removing `-std=gnu89`:

- include: fix public curl headers to use the correct printf mask for
`CURL_FORMAT_CURL_OFF_T` and `CURL_FORMAT_CURL_OFF_TU` with mingw-w64
and Visual Studio 2013 and newer. This fixes the printf mask warnings
in examples and tests. E.g. [1]

- conncache: fix printf format string [2].

- http2: fix potential null pointer dereference [3].
(seen on Slackware with gcc 11.)

- libssh: fix printf format string in SFTP code [4].
Also make MSVC builds compatible with old CRT versions.

- libssh2: fix printf format string in SFTP code for MSVC.
Applying the same fix as for libssh above.

- unit1395: fix `argument is null` and related issues [5]:
- stop calling `strcmp()` with NULL to avoid undefined behaviour.
- fix checking results if some of them were NULL.
- do not pass NULL to printf `%s`.

- ci: keep a build job with `-std=gnu89` to continue testing for
C89-compliance. We can apply this to other gcc jobs as needed.
Ref: b23ce2cee7329bbf425f18b49973b7a5f23dfcb4 (2022-09-23) #9542

[1] https://dev.azure.com/daniel0244/curl/_build/results?buildId=18581&view=logs&jobId=ccf9cc6d-2ef1-5cf2-2c09-30f0c14f923b
[2] https://github.com/curl/curl/actions/runs/6896854263/job/18763831142?pr=12346#step:6:67
[3] https://github.com/curl/curl/actions/runs/6896854253/job/18763839238?pr=12346#step:30:214
[4] https://github.com/curl/curl/actions/runs/6896854253/job/18763838007?pr=12346#step:29:895
[5] https://github.com/curl/curl/actions/runs/6896854253/job/18763836775?pr=12346#step:33:1689

Closes #12346

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GHA: fix checkout of quictls repository to use correct branch name

Follow-up to c868b0e30f10cd0ac7

Closes #12232

GHA: bump ngtcp2, nghttp3, nghttp2 and quictls versions

ngtcp2 1.0.1
nghttp3 1.0.0
nghttp2 1.58.0
quictls 3.1.4+quic

also sync HTTP3.md with these changes

Close

GHA: bump ngtcp2, nghttp3, nghttp2 and quictls versions

ngtcp2 1.0.1
nghttp3 1.0.0
nghttp2 1.58.0
quictls 3.1.4+quic

also sync HTTP3.md with these changes

Closes #12132

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GHA: move mod_h2 version in CI to v2.0.25

Closes #12157

GHA/linux: mbedtls 3.5.0 + minor dep bumps

Closes #12057

gha: bump actions to latest versions

- actions@checkout@v4 (from v3 and v2)

- fsfe/reuse-action@v2 (from v1)

Closes #12000

GHA/linux: run singleuse to detect single-use global functions

Use --unit for configure --enable-debug builds

Closes #11932