Fix fix_priv_tables.test: make mysql_system_tables_fix.sql to not modify user.password_expired column.

- make the test output stable
- make Log_to_csv_event_handler::log_slow() to write the value 
  of thd->thread_id (it didn't, and so 0 was always logged).

- Work around the problem by forcing recalc_pool to free its buffer
  in dict_stats_recalc_pool_deinit().

 "Unknown table tbl" is now "Unknown table database.tbl"
(part#3)

 "Unknown table tbl" is now "Unknown table database.tbl"

Merged all ddl_logging code.
Merged sql_partition.cc
innodb_mysql_lock2.test and partition_cache.test now works.
Changed interface to strconvert() to make it easier to use with not \0 terminated strings.

sql/sql_partition.cc:
  Full merge with 5.6
sql/sql_table.cc:
  Merged all ddl_logging code
sql/strfunc.cc:
  Added from_length argument to strconvert() to make it possible to use without end terminated strings.
sql/strfunc.h:
  Added from_length argument to strconvert() to make it possible to use without end terminated strings.

 "Unknown table tbl" is now "Unknown table database.tbl"

  persistent table statistics with ANALYZE TABLE commands

    
MySQL 5.6.10 performance schema: merge of the test files for the host_cache table

With this patch, all tests perfschema.hostcache_* pass.
There are still some additional unmerged minor changes to these tests
in mysql 5.6.10.

  caused by weird behavior in innodb's persistent stats
- Run the testsuite without innodb persistent stats

- Run ANALYZE TABLE after insert, like mysql-5.6 does.

reuse the approach from vasil.dimov@oracle.com-20120521133620-glj6l0ntcsrz0wbl
run ANALYZE TABLE.

  
MySQL 5.6.10 performance schema: merge of the test files for the host_cache table

mysql-test/r/mdl_sync.result:
  Full merge with 5.6
mysql-test/t/mdl_sync.test:
  Full merge with 5.6
sql/debug_sync.cc:
  Full merge with 5.6
sql/debug_sync.h:
  Full merge with 5.6
sql/mdl.cc:
  Full merge with 5.6
sql/sql_base.cc:
  Removed code not in 5.6 anymore

  appears as not handled) fixed.

Fixed OPTIMIZE with innodb


include/my_sys.h:
  Removed ATTRIBUTE_FORMAT() as it gave warnings for %'s
sql/log_event.cc:
  Optimization: 
  use my_b_write() and my_b_write_byte() instead of my_b_printf()
  use strmake() instead of my_snprintf()
sql/sql_admin.cc:
  Fixed bug in admin_recreate_table()
  Fixed OPTIMIZE with innodb
sql/sql_table.cc:
  Indentation fixes
strings/my_vsnprintf.c:
  Changed fprintf() to fputs()

CF_PREOPEN_TMP_TABLES & CF_HA_CLOSE & Patch for Bug#11746602 (27480: Extend CREATE TEMPORARY TABLES 
  privilege to allow temp table operations).

Added sql_mode_t to simplify merges

MySQL 5.6.10 performance schema: merge of host_cache table

A fix of unions with duplicate rows and returning bug fix for lp:732124 union + limit returns wrong result

Fixed type and testing of last_update type for innodb_table_stats

mysql-test/r/connect.result:
  Removed tables which are not created anymore
sql/item_sum.h:
  Fixed typo
sql/sql_base.cc:
  Don't update table and index statics for temporary tables
sql/sys_vars.cc:
  Merge
storage/innobase/dict/dict0stats.cc:
  Fixed type last_update to TIMESTAMP.

Disabled some asserts that we can't yet have enabled