Adopt the same install-build-deps.sh the upstream Salsa-CI has started
using. Since we have our own custom build step (to support autobake-deb.sh)
we need to maintain in like this and adopt to upstream changes.

This change will make the stretch-backports build pass and use the
backported libzstd-dev 1.3.8 library (to satisfy the > 1.3.3 requirement).

Also clean away excess autopkgtest stanza and allow missing-breaks to
fail so that in total Salsa-CI would now pass.

- Add libarchive-dev and libkrb5-dev as they are defined as dependencies
  in debian/control
- Update curl dependency to libcurl4-openssl-dev, available in Bionic and Focal
- Remove libstemmer-dev that was added without documented motivations in
  https://github.com/ottok/mariadb/commit/e9ada862651fdb98f84871e4ec59bef1bb36646d
- Remove libdistro-info-perl that was added due to need by autobake-deb.sh
  in https://github.com/ottok/mariadb/commit/eb04ee5c9d2416aa45acd1353dff19f569e96317
  but which is not needed anymore

Keep the user and password definitions as e.g. dbconfig-common expects to
find them there. Extend the file to document (in context) why it is about
to be obsoleted to facilitate users migrating away from it.

Upstreamed from https://salsa.debian.org/mariadb-team/mariadb-10.5/-/commit/a6583c15226ad9a0ca37861e1bd01057bcff32a5

- Add cracklib-runtime and libarchive-dev as build dependencies
- Update Debian policy standards version to 4.5.0
- Add libssl-dev to libmariadb-dev run-time dependency
- Add "Multi-Arch: same" to packages that have it in Debian
- Sync README.Debian
- Sync debian/rules formatting
- Sync autopkgtests

Upstreamed from https://salsa.debian.org/mariadb-team/mariadb-10.5/-/commit/13e3a7903e5c72e70c02b98a3e51a6de70b9b6ef

Also clean away impossible/unnecessary "Multi-Arch: same" stanzas.
Mostly upstreamed from https://salsa.debian.org/mariadb-team/mariadb-10.5/-/commit/f0ba31e1565feaca9c2a6f2534e55bfc29af7021

Omitted 'libzstd-dev (>= 1.3.3)' as the version requirement would need
stretch-backports to be available on buildbot.askmonty.org builders and
they are not yet.

The mariadb.service systemd file indeed does contain:
  ExecStartPost=/etc/mysql/debian-start

So don't claim it does not use debian-start.

Upstreamed from https://salsa.debian.org/mariadb-team/mariadb-10.5/-/commit/af869e703014b25795b0891e3450520c599d3650

- no space after comment
- align equal signs in groups

Upstreamed from: https://salsa.debian.org/mariadb-team/mariadb-10.5/-/commit/a8c67e15c9a58199f085ae84cdb97c542667767d

Let us use Intel intrinsic functions in WolfSSL whenever possible.
This allows such code to be compiled WITH_MSAN.

Move 'encryption' tests to another job, since the 'binlog' and 'rpl'
tests are so slow and often make the job timeout (after 50 minutes).

Allow failure in ppc64el as it frequently fails due to out-of-memory.
A simple restart often fixes it, but we can't depend on restarts.

Also re-enable arm64 as MDEV-23955 is now fixed.

MERGING: This commit is OK to merge 10.6 and upwards.

If PLUGIN_COLUMNSTORE is not defined, ColumnStore will build automatically
by default on supported architectures as defined in its CMakeFile.txt.

Thus there should not be any need to inject this build flag at any point
and it can be removed to keep thing lean and clean.

ColumnStore seems to build by default, so it must be explicitly disabled
with a build flag, so that it does not build at all and thus build machine
disk space and CPU will be spared.

This reverts commit 113f1868.

Add missed PSI_CALL_drop_table_share().

Refactor previous commit to fix mistake revealed by Buildbot. We can't
have a structure where PLUGIN_COLUMNSTORE would ever be 'YES' on an arch
that does not support it, as the flag overrides any potential platform
detection code and builds on non-amd64 would all fail.

- Use new Salsa-CI templates just like downstream does
- Also apply adaptations needed for native MariaDB to
  build correctly on Salsa-CI
- Adapt for mysql-8.0 now in Debian Sid, keep also mysql-5.7 test
- Test TLSv1.3 to ensure it does not regress
- Remove Snappy compression from autopkgtest as it not longer works

ColumnStore files and debian/control stanza was removed in 1edd2243, and
thus will not be included in a native build. Also adapt the debian/rules
to follow this same policy and only build ColumnStore in builds triggered
from autobake-deb.sh. Avoiding building ColumnStore in vain saves a lot of
build time and disk space.

Maintaining the same deterministic file order in both upstream (this) and
downstream (Debian) repositories makes it easier to compare the delta.

We are seeing !buf_pool.any_io_pending() assertion failures
in srv_start() ever since MDEV-21452 in 10.6. But, the
problem appears to be older. In 10.5 since MDEV-19514 removed
writes from the precursor of buf_page_read_complete(), it
seems that the debug assertion failure could have been harmless.

recv_sys_t::apply(): At the end of each batch, wait not only
for all log records to have been processed, but also for all
pending reads to complete, so that the buffer pool will be in
an idle state.

list all supported options in the comment.
remove wsrep-specific hack of EXPORT_SYMBOLS, wsrep-specific hacks
belong to wsrep

Reverts 10.5 commit 6033cc85
The fix a587ded2 will be merged from 10.2

In commit 0c23e32d (MDEV-24445)
we forgot to keep m_freed_space in sync with m_freed_pages in one case.

In the rewrite of MDEV-8139 (based on MDEV-15528), we introduced a
wrong assumption that any persistent tablespace that is not an .ibd
file is the system tablespace. This assumption is broken when
innodb_undo_tablespaces (files undo001, undo002, ...) are being used.
By default, we have innodb_undo_tablespaces=0 (the persistent undo
log is being stored in the system tablespace).

In MDEV-15528 and MDEV-8139 we rewrote the page scrubbing logic
so that it will follow the tried-and-true write-ahead logging
protocol, first writing FREE_PAGE records and then in the page
flushing, zerofilling or hole-punching freed pages.

Unfortunately, the implementation included a wrong assumption that
that anything that is not in an .ibd file must be the system tablespace.
This wrong assumption would cause overwrites of valid data pages in
the system tablespace.

mtr_t::m_freed_in_system_tablespace: Remove.

mtr_t::m_freed_space: The tablespace associated with m_freed_pages.

buf_page_free(): Take the tablespace and page number as a parameter,
instead of taking a page identifier.

A race condition between deleting an .ibd file and fil_crypt_thread
marking pages dirty was introduced in
commit 118e258a (part of MDEV-23855).

fil_space_t::acquire_if_not_stopped(): Correctly return false
if the STOPPING flag is set, indicating that any further activity
on the tablespace must be avoided. Also, remove the constant parameter
have_mutex=true and move the function declaration to the same
compilation unit with the only callers.

fil_crypt_flush_space(): Remove an unused variable.

fil_crypt_find_space_to_rotate(): Always treat the sentinel value
that indicates that we have run out of work, even if at the same
time the thread should shut down due to other reasons.

Thanks to Matthias Leich for reproducing this bug with RQG.

After MDEV-15528, two modes of operation in the fil_crypt_thread
remains, depending on whether innodb_encryption_rotate_key_age=0
(whether key rotation is disabled). If the key rotation is disabled,
the fil_crypt_thread miss the opportunity to sleep, which will result
in lots of wasted CPU usage.

fil_crypt_return_iops(): Add a parameter to specify whether other
fil_crypt_thread should be woken up.

fil_system_t::keyrotate_next(): Return the special value
fil_system.temp_space to indicate that no work is to be done.

fil_space_t::next(): Propagage the special value fil_system.temp_space
to the caller.

fil_crypt_find_space_to_rotate(): If no work is to be done,
do not wake up other threads.