Part#2: stabilize the test output

        Condition was fixed.

This fixes several InnoDB bugs related to innodb_encrypt_log and
two Mariabackup --backup bugs.

log_crypt(): Properly derive the initialization vector from the
start LSN of each block. Add a debug assertion.

log_crypt_init(): Note that the function should only be used when
creating redo log files and that the information is persisted in
the checkpoint pages.

xtrabackup_copy_log(): Validate data_len.

xtrabackup_backup_func(): Always use the chosen checkpoint buffer.

log_group_write_buf(), log_write_up_to(): Only log_crypt() the redo
log payload, not the padding bytes.

innobase_start_or_create_for_mysql(): Do not invoke log_crypt_init()
or initiate a redo log checkpoint.

recv_find_max_checkpoint(): Return the contents of LOG_CHECKPOINT_NO
to xtrabackup_backup_func() in log_sys->next_checkpoint_no.

        Implementation for the reverse spatial predicates was lost
        somehow.

        Let's check the validity to the end of the JSON.

Implement lock-ddl-per-table option that locks tables before it
is copied to backup, and helds the lock until backup finished

The "DDL-lock" itself is implemented as "SELECT * from <table> LIMIT 0",
inside a transaction, and "COMMIT" of this transaction is the DDL-unlock.

Now we allow derived in the from clause of subqueries so set
flag which prevent optimisation of subqueries during view
creation before derived processing so subquery will be
correctly printed in the view .frm.

trx_undo_assign_undo(): Restore the fault injection.

Import the test innodb.alter_crash

The redo log is divided into 512-byte blocks. Sometimes, some of
the strings end up at a block boundary and will not be found.
Look for only one match.

full server recovery is performed .
We start "mysqld" with  --bootstrap
and pass bootstrap script consisting of several FLUSH TABLES FOR export/
UNLOCK TABLES

recv_reset_logs(): Initialize the redo log buffer, so that no data
from the old redo log can be written to the new redo log.

This bug has very little impact before MariaDB 10.2. The
innodb_log_encrypt option that was introduced in MariaDB 10.1
increases the impact. If the redo log used to be encrypted, and
it is being resized and encryption disabled, then previously
encrypted data could end up being written to the new redo log
in clear text. This resulted in encryption.innodb_encrypt_log
test failures in MariaDB 10.2.

The SEARCH_ABORT logic was not working as intended
(tests were not being aborted).

In XtraDB, buf_block_get_frame() can return NULL, and this value
can be passed to buf_page_print(). Do not declare the parameter
as nonnull.

The files ibtmp1 and ib_buffer_pool are sometimes created, sometimes not.
Remove them if they exist.

MDEV-13523: Group By in a View, called within a Stored Routine causes Error Code 1356 when a non-root user runs the routine for a second time

it is actually test suite for second code chunk fix in MDEV-13439

The bug only affects ROW_FORMAT=DYNAMIC tables.
It is reproducible already with 2 records in the table.

Keep testing with ROW_FORMAT=REDUNDANT just in case.

The bug only affected innodb_page_size=64k. There is no point
running the test with smaller page sizes.

buf_page_print(): Remove the parameter 'flags',
and when a server abort is intended, perform that in the caller.

In this way, page corruption reports due to different reasons
can be distinguished better.

This is non-functional code refactoring that does not fix any
page corruption issues. The change is only made to avoid falsely
grouping together unrelated causes of page corruption.

Rdb_io_watchdog can not be built on  OS X. Disable it.

Was reported as 'rpl.rpl_gtid_stop_start fails with Valgrind in buildbot and outside'.
The 'Conditional jump or move depends on uninitialized value' valgrind complaint is valid
and means THD::m_current_stage_key that is not initialized indeed by constructor.

Fixed with its initialization added to the initializer list of
THD::THD.  Double checked with mysql to have found a similar fixes for
the very same issue which was discovered after P_S merge to Maria
(60589aee where the member is introduced) had been done.

A new $MYSQLD_LAST_CMD evaluation was too late in case --manual-gdb.
Now it is done before the server restart type branches which is safe
and the args value has been fully computed by the new point of
evaluation.

save thd->select_number between parsing and executions (in case it was not complete executed due to errors (for example epsent table))

This is a backport of the following:

MDEV-13009 10.1.24 does not compile on architectures without 64-bit atomics

Add a missing #include "sync0types.h" that was removed in MDEV-12674.

* Fix bash expansion issue in wsrep_sst_rsync. https://github.com/docker-library/mariadb/issues/126

* Fix permissions

Follow-up to MDEV-13570 Assertion failure !srv_read_only_mode in --innodb-read-only shutdown when buf_resize_thread is active

logs_empty_and_mark_files_at_shutdown(): Actually skip the debug assertion
when the buf_resize_thread is active. The previous fix skipped the
debug assertion failure when buf_dump_thread is active. Both these
threads are created also in innodb_read_only mode. Depending on how
fast these threads react to the shutdown signal, the debug assertion
could be triggered.

There is no impact on non-debug servers, and very little impact on
debug servers either, because in innodb_read_only shutdown, no InnoDB
files will need to be written.

metadata_lock_info_duration[]: Remove the unused variable.

Add some comments /* fall through */ to silence -Wimplicit-fallthrough