Type_handler_xxx::Item_const_eq() can handle only non-NULL values.
The code in Item_basic_value::eq() did not take this into account.

Adding a test to detect three different combinations:
- Both values are NULLs, return true.
- Only one value is NULL, return false.
- Both values are not NULL, call Type_handler::Item_const_eq()
  to check equality.

Not only Ubuntu Focal builds openssl with OPENSSL_TLS_SECURITY_LEVEL=2,
but for some unfathomable reason it patches openssl sources to disable
TLS < 1.2 at security level 2, even though openssl manual says it
should only happen at level 4:
https://www.openssl.org/docs/man1.1.0/man3/SSL_CTX_set_security_level.html

We test TLSv1.1 and TLSv1, so we have to override Focal defaults in mtr.

setup alternative name for rhel8/centos8

use correct C/C version when providing mariadb-connector-c
and other changes for installation over distro packages to work:

  dnf install mariadb-server
  dnf install --allowerasing MariaDB-{server,common,client,shared}*.rpm

When we move data we should fix buffer string length

remove Timeval workaround (not needed anymore).
add template workaround.
comments.

Fix WolfSSL build:

- Do not build with TLSv1.0,it stopped working,at least with SChannel client
- Disable a test that depends on TLSv1.0
- define FP_MAX_BITS always, to fix 32bit builds.
- Increase MAX_AES_CTX_SIZE, to fix build on Linux

under LOCK TABLES we still have to open everything, otherwise DML
prelocking will try to take an MDL on a table that wasn't in the
LOCK TABLES list.

MDEV-21421 : Galera test sporadic failure on galera.galera_as_slave_gtid_myisam: Result length mismatch

Add wait_condition so that drop table has time to replicate to
Galera cluster.

Add missing .test and .result files.

Rowid Filter check is just like Index Condition Pushdown check: before
we check the filter, we must check if we have walked out of the range
we are scanning. (If we did, we should return, and not continue the scan).

Consequences of this:
- Rowid filtering doesn't work for keys that have partially-covered
  blob columns (just like Index Condition Pushdown)
- The rowid filter function has three return values: CHECK_POS (passed)
  CHECK_NEG (filtered out), CHECK_OUT_OF_RANGE.

All of the above is implemented in this patch

Also fixes:
MDEV-21487: Implement option for mysql_upgrade that allows root@localhost to be replaced
MDEV-21486: Implement option for mysql_install_db that allows root@localhost to be replaced

Add user mariadb.sys to be definer of user view
(and has right on underlying table global_priv for
required operation over global_priv
(SELECT,UPDATE,DELETE))

Also changed definer of gis functions in case of creation,
but they work with any definer so upgrade script do not try
to push this change.

%config(noreplace) /etc/security

Supplied buffer for error string, on WolfSSL's request.

only MDL-prelock but do not open FK child tables for read-only (RESTRICT)
FK actions.

Tables still needs to be opened for CASCADE actions, see 9180e866

We must ensure that the NUL will not terminate the query string.

Replace the 30-second sleep in the test with proper
DEBUG_SYNC interlocking.

MDEV-21437 MariaDB's SUSE/SLES packages don't "provide" all of the same capabilities as the platform's default packages

ha_innobase::check_if_supported_inplace_alter(): Do not allow
ALGORITHM=INSTANT for operations that avoid a table rebuild
but involve dropping (or creating) secondary indexes.

MDEV-20502 Queries against spider tables return wrong values for columns following constant declarations.

Add test cases.

Do not show exact value as it depends order of test execution.
Instead use # for correct values and ERROR for incorrect.

commit 5e7e7153 accidentally
broke the build without WSREP, by misplacing an #endif.

commit d467bb7e accidentally
broke the build without WSREP, by misplacing an #endif.

This is a partial backport of
commit 5e7e7153 from 10.4.

assert_trx_is_free(): Assert !is_wsrep().

trx_init(): Do not initialize trx->wsrep, because it must have been
initialized already.

trx_commit_in_memory(): Invoke wsrep_commit_ordered(). This call
was being skipped, because the transaction object had already been
freed to the pool.

trx_rollback_for_mysql(), innobase_commit_low(),
innobase_rollback_trx(): Always reset trx->wsrep.