MDEV-16421 Make system tables crash safe

Make all system tables in mysql directory of type
engine=Aria

Privilege tables are using transactional=1
Statistical tables are using transactional=0, to allow them
to be quickly updated with low overhead.
Help tables are also using transactional=0 as these are only
updated at init time.

Other changes:
- Aria store engine is now a required engine
- Update comment for Aria tables to reflect their new usage
- Fixed that _ma_reset_trn_for_table() removes unlocked table
  from transaction table list. This was needed to allow one
  to lock and unlock system tables separately from other
  tables, for example when reading a procedure from mysql.proc
- Don't give a warning when using transactional=1 for engines
  that is using transactions. This is both logical and also
  to avoid warnings/errors when doing an alter of a privilege
  table to InnoDB.
- Don't abort on warnings from ALTER TABLE for changes that
  would be accepted by CREATE TABLE.
- New created Aria transactional tables are marked as not movable
  (as they include create_rename_lsn).
- bootstrap.test was changed to kill orignal server, as one
  can't anymore have two servers started at same time on same
  data directory and data files.
- Disable maria.small_blocksize as one can't anymore change
  aria block size after system tables are created.
- Speed up creation of help tables by using lock tables.
- wsrep_sst_resync now also copies Aria redo logs.

1 files changed, 4 insertions, 4 deletions

diff --git a/mysql-test/main/help.test b/mysql-test/main/help.test
index 802f24f80a9..725eec2771f 100644
--- a/mysql-test/main/help.test
+++ b/mysql-test/main/help.test
@@ -98,10 +98,10 @@ help 'impossible_function_1';
 help 'impossible_category_1';
 ##############
 
-alter table mysql.help_relation engine=myisam;
-alter table mysql.help_keyword engine=myisam;
-alter table mysql.help_topic engine=myisam;
-alter table mysql.help_category engine=myisam;
+alter table mysql.help_relation engine=aria;
+alter table mysql.help_keyword engine=aria;
+alter table mysql.help_topic engine=aria;
+alter table mysql.help_category engine=aria;
 
 delete from mysql.help_topic where help_topic_id=@topic1_id;
 delete from mysql.help_topic where help_topic_id=@topic2_id;