MDEV-9220 Split filesort.cc:make_sortkey() and filesort.cc::sortlength() into virtual methods in Type_handler

Also fixes:
MDEV-9391 InnoDB does not produce warnings when doing WHERE int_column=varchar_column
MDEV-9337 ALTER from DECIMAL and INT to DATETIME returns a wrong result
MDEV-9340 Copying from INT/DOUBLE to ENUM is inconsistent
MDEV-9392 Copying from DECIMAL to YEAR is not consistent about warnings

Fix process  handle leak in buildbot. GenerateConsoleCtrlEvent sent to non-existing process will add a process handle to this non-existing process to console host process conhost.exe

Fixed main.shutdown failure on Windows.

as it's needed for Cassandra in 10.0.

Perform database installation in one mysqld run. This makes mysql_install_db
3x faster.

Provided IBM System Z have outdated compiler version, which supports gcc sync
builtins but not gcc atomic builtins. It also has weak memory model.

InnoDB attempted to verify if __sync_lock_test_and_set() is available by
checking IB_STRONG_MEMORY_MODEL. This macro has nothing to do with availability
of __sync_lock_test_and_set(), the right one is HAVE_ATOMIC_BUILTINS.

Provided IBM System Z have outdated compiler version, which supports gcc sync
builtins but not gcc atomic builtins. It also has weak memory model.

InnoDB attempted to verify if __sync_lock_test_and_set() is available by
checking IB_STRONG_MEMORY_MODEL. This macro has nothing to do with availability
of __sync_lock_test_and_set(), the right one is HAVE_ATOMIC_BUILTINS.

Copy_field::get_copy_func().

Provided IBM System Z have outdated compiler version, which supports gcc sync
builtins but not gcc atomic builtins. It also has weak memory model.

InnoDB attempted to verify if __sync_lock_test_and_set() is available by
checking IB_STRONG_MEMORY_MODEL. This macro has nothing to do with availability
of __sync_lock_test_and_set(), the right one is HAVE_ATOMIC_BUILTINS.

Embedded now supports "--version=<version>", while "--version" is still silently
ignored. Also only run protocol check in non-embedded mode.

innodb 32-bit
funcs_1 embedded

MDEV-9186 - Debian packaging: extend libcrack hack to create correct control file

For now, only if ccache is installed with symlinks in /usr/lib64/ccache

Fixed by adding HA_ERR_INFO as a informational warning to by used by MyISAM
This is used to inform when we create a backup copy of the data file.

Also improved informational messages when creating backup copies of data and index files

A deadlock can occur when the wsrep applier thread while
executing FLUSH TABLES waits for MDL lock owned by other
local transactions, which in turn are waiting for commit
order if their seqno comes after one assigned to FLUSH
TABLES.
Fixed by making sure that the wsrep applier thread while
executing FLUSH TABLES does not wait for table share(s)
to be removed from table definition cache.

Addendum: Save thd's server_status & option_bits before
setting the thread specific pointer.

Adjust systemd files to enable CAP_IPC_LOCK to allow rootless mlockall
(triggered by memlock option).

This is amended version of a patch originally submitted by Daniel Black.

Set umask so that newly created file is not readable by others. This is a quick
fix to close security gap. To be replaced by MDEV-8375 - passwordless root
login.

Allow absolute paths for INSTALL_*DIR.

binlog_savepoint_rollback() should not try to truncate a binlog
unless binlog_savepoint_set has actually remembered the position
to truncate to.