Also fixed a bug in sql_update.cc: the code of mysql_update() lacked
a call of set_statistics_for_table().

Made allocation of memory for statistical data in a table share to be thread safe.
This memory is now allocated in a special MEM_ROOT that is created for each
table share.  

Remove timed mutexes in XtraDB - obsolete feature that does not link on Windows, if plugin is build dynamically
It was already  removed from innobase in the past.

Reasons:
  - as of 5.5.27, YEAR(2) is deprecated, hence the new warning;
  - MDEV-553 - different error code/message on out-of-range autoincrement;
  - INSERT IGNORE now produces a warning if a duplicate was encountered

storage_engine tests and upstream engines/* suites went out of sync with current MariaDB code. Reasons:
  - as of 5.5.27, YEAR(2) is deprecated, hence the new warning;
  - MDEV-553 - different error code/message on out-of-range autoincrement;
  - INSERT IGNORE now produces a warning if a duplicate was encountered (change pushed along with MDEV-553)

The patch lifts the limitation of the current implementation
of ALTER TABLE that does not allow to build unique/primary
indexes by sort for MyISAM and Aria engines.

Implement it in a different way that works on both release and debug
builds, and still uses --skip instead of --require.

have_openssl variable was ON even when OpenSSL was not used (but YaSSL was).
fix that, so that have_openssl really corresponds to OpenSSL

rename not_openssl.inc to not_ssl.inc and fix the test accordingly.

remove unused require files

MDEV-438 Microseconds: Precision is ignored in CURRENT_TIMESTAMP(N) when it is given as a default column value

For MySQL 5.6 compatibility, support precision specification in CURRENT_TIMESTAMP in
a default clause, when it's not less than the column's precision.

With MDEV-532, the binlog_checkpoint event is logged asynchronously
from a binlog background thread. This causes some sporadic failures
in some test cases whose output depends on order of events in
binlog.

Fix using an include file that waits until the binlog checkpoint
event has been logged before proceeding with the test case.

MDEV-3816 init-file stops getting executed if a long enough line is encountered; on a debug version, assertion `! is_set() || can_overwrite_status' fails
backport improved bootstrap error handling from 5.6

Was:
  revno: 3768.1.1
  committer: Christopher Powers <chris.powers@oracle.com>
  timestamp: Wed 2012-05-02 22:16:40 -0500
  message:
    Bug#11766342 INITIAL DB CREATION FAILS ON WINDOWS WITH AN ASSERT IN SQL_ERROR.CC
    Improved bootstrap error handling:
    - Detect and report file i/o errors
    - Report query size errors with nearest query text

Treat the host table as optional, don't abort when it's missing

MDEV-3837 Assertion `table->read_set == &table->def_read_set' failed on updating a performance_schema table
This was failing not only for P_S, but for any engine that had
HA_PRIMARY_KEY_REQUIRED_FOR_DELETE flag set (in the tree - only P_S and federated).
Because of this flag, read_set and write_set were (possibly) changed
on update. But later the code modified these bitmaps and restored them to the default
state, losing HA_PRIMARY_KEY_REQUIRED_FOR_DELETE related changes.

sql/handler.cc:
  small optimization.
  don't change the *write* set only because all columns has to be *read*

  revno: 3383
  revision-id: georgi.kodinov@oracle.com-20110818083108-qa3h3ufqu4zne80a
  committer: Georgi Kodinov <Georgi.Kodinov@Oracle.com>
  timestamp: Thu 2011-08-18 11:31:08 +0300
  message:

  Bug #11766001: 59026: ALLOW MULTIPLE --PLUGIN-LOAD OPTIONS
  
  Implemented support for a new command line option :
  --plugin-load-add=<comma-separated-name-equals-value-list>
  This option takes the same type of arguments that --plugin-load does
  and complements --plugin-load (that continues to operate as before) by
  appending its argument to the list specified by --plugin-load.
  So --plugin-load can be considered a composite option consisting of 
  resetting the plugin load list and then calling --plugin-load-add to process
  the argument.
  Note that the order in which you specify --plugin-load and --plugin-load-add 
  is important : "--plugin-load=x --plugin-load-add=y" will be equivalent to
  "--plugin-load=x,y" whereas "--plugin-load-add=y --plugin-load=x" will be 
  equivalent to "plugin-load=x".
  
  Incompatible change : the --help --verbose command will no longer print the 
  --plugin-load variable's values (as it doesn't have one). Otherwise both --plugin-load 
  and --plugin-load-add are mentioned in it.

Make the commit checkpoint inside InnoDB be asynchroneous.
Implement a background thread in binlog to do the writing and flushing of
binlog checkpoint events to disk.

that introduced engine independent persistent statistics.
In particular:
- added an enumeration type for possible values of the system
  variable use_stat_tables
- renamed KEY::real_rec_per_key to KEY::actual_rec_per_key
- optimized the collection of statistical data for any primary
  key defined only on one column.
  

Post-review changes according to Monty's review from 28/11/2012.

If a query referenced some system statistical tables, but not all of them,
then executing an ANALYZE command simultaneously with this query could
lead to a deadlock.
The fix prohibited reading statistics from system statistical tables
for such queries.

Removed the function unlock_tables_n_open_system_tables_for_write()
as not used anymore.
Performed some minor refactoring of the code in sql_statistics.cc. 

engine-independent statistics.
If a table was created for InnoDB then the execution of the
ANALYZE command over this table blocked any INSERT/DELETE/UPDATE
of the table. 

engine-independent statistics.
When the primary key was dropped or changed statistics on secondary
indexes for the prefixes that included components of the primary 
key was not removed from the table mysql.index_stats.

Also fixed: in the some cases when a column was changed statistics
on the indexes that included this column was not removed from the
table mysql.index_stats.

Also disabled the test mdev-504 for --ps-protocol.