- Calls to cleanup_load_tmpdir() could delete temporary files for another master connection
- Concurrent LOAD DATA commands from two master connections could use the same file name

Other bug fixes:
- Enlarge buffer for connection names with 'special characters' one can't store in filenames

Optimization:
- Don't do 'lower case' of connection names. We can use cmp_connection_name, where we already have the connection name in lower case.


mysql-test/suite/multi_source/load_data.result:
  Test case for MDEV-4352
mysql-test/suite/multi_source/load_data.test:
  Test case for MDEV-4352
sql/log_event.cc:
  Fixed: MDEV-4352
  - Calls to cleanup_load_tmpdir() could delete temporary files for another master connection
  - Concurrent LOAD DATA commands from two master connections could use the same file name
  
  The fix was to add the connection name (if one exists) to all slave temporary files used by LOAD DATA
sql/rpl_mi.cc:
  Enlarge buffer for connection names with 'special characters' one can't store in filenames
  Use mi->cmp_connection_name for connection file names.
sql/rpl_rli.cc:
  Use mi->cmp_connection_name for connection file names.
sql/slave.cc:
  Removed not needed empty line
sql/sql_const.h:
  Added MAX_FILENAME_MBWIDTH to be able to calculate buffer length for connection_names stored in file names
sql/sql_repl.cc:
  Use mi->cmp_connection_name for connection file names.

When the slave connects, the master skips binlog event groups
until it reaches the position requested by the slave. To
identify event groups, it needs to detect COMMIT events. But
this detection did not correctly handle binlog checksums, so
could incorrectly skip extra groups due to not detecting the
end of an event group.

Server shutdown timeout of 10 seconds in test cases is too little for heavily
loaded test servers.

Fix innodb_bug12902967 to not fail with wrong error log output if we have
warnings about too few AIO handles for InnoDB.

Fix typo which could lead to unnecessarily replacing GTID event with dummy
event.

The slave dump thread running on the master only checked thd->killed whenever
it reached the end of a binlog file, not between events. This could
unnecessarily delay server shutdown.

This was found by code inspection while tracking down some occasional "forcing
close of thread..." errors in Buildbot. Hopefully this will fix the failures,
but the fix is correct in any case.

Also increase the wait during server shutdown, 2 seconds is a bit tight in
case of heavy I/O stall, and it seems better to delay shutdown a bit than
force-kill threads unnecessarily.

Also fix some races in test cases that restart the mysqld server. The .expect
file should be changed with --append_file, --remove_file + --write_file
creates a short window where mysqld can error out due to .expect file missing.

Fixed a wrong result from mysqld--help.test.

This bug in the code of get_column_range_cardinality() could lead to
wrong estimates of number of records in ranges for non-nullable columns.  

MDEV-4398 - remove incorrect fix, replace with correct one  -  change default to  OFF for innodb_use_fallocate

Sampling of selectivity of LIKE predicate.

tables retrieved by range scans.

Added comments forgotten in the previous patch. 

mysql_options() with MYSQL_OPT_USE_THREAD_SPECIFIC_MEMORY

include/mysql.h:
  Added MYSQL_OPT_USE_THREAD_SPECIFIC_MEMORY
include/mysql.h.pp:
  Updated file
sql-common/client.c:
  Marked client memory as THREAD_SPECIFIC
sql/event_db_repository.cc:
  Fixed compiler warning
sql/slave.cc:
  Marked client memory as THREAD_SPECIFIC
storage/federatedx/federatedx_io_mysql.cc:
  Marked client memory as THREAD_SPECIFIC
storage/federatedx/ha_federatedx.cc:
  Marked client memory as THREAD_SPECIFIC
storage/sphinx/ha_sphinx.cc:
  Marked client memory as THREAD_SPECIFIC

sql/keycaches.cc:
  Added free_all_rpl_filters() to be able to free all filters at cleanup
sql/keycaches.h:
  Added prototype
sql/rpl_rli.cc:
  Fixed compiler warning
sql/slave.cc:
  Free all rpl_filters at cleanup
sql/sp.cc:
  Fixed compiler warning when not all struct elements was initialized
sql/sql_acl.cc:
  Fixed compiler warning when not all struct elements was initialized
storage/perfschema/table_events_waits.cc:
  Fixed compiler warning when not all struct elements was initialized
storage/perfschema/table_events_waits_summary.cc:
  Fixed compiler warning when not all struct elements was initialized
storage/perfschema/table_ews_global_by_event_name.cc:
  Fixed compiler warning when not all struct elements was initialized
storage/perfschema/table_file_instances.cc:
  Fixed compiler warning when not all struct elements was initialized
storage/perfschema/table_file_summary.cc:
  Fixed compiler warning when not all struct elements was initialized
storage/perfschema/table_performance_timers.cc:
  Fixed compiler warning when not all struct elements was initialized
storage/perfschema/table_setup_consumers.cc:
  Fixed compiler warning when not all struct elements was initialized
storage/perfschema/table_setup_instruments.cc:
  Fixed compiler warning when not all struct elements was initialized
storage/perfschema/table_setup_timers.cc:
  Fixed compiler warning when not all struct elements was initialized
storage/perfschema/table_sync_instances.cc:
  Fixed compiler warning when not all struct elements was initialized
storage/perfschema/table_threads.cc:
  Fixed compiler warning when not all struct elements was initialized
storage/xtradb/os/os0file.c:
  Fixed compiler warning when not all struct elements was initialized

 - Fix embedded build

 - Backport disable of fallocate, it creates too short ibdata1
   when used with O_DIRECT on old kernels

 - Do not disable innodb during .deb install, we need it for
   mysql.rpl_slave_state table.

Users can set different repplication filter rules for each replication connection, in my.cnf or command line.
But the rules set online will not record in master.info, it means if users restart MySQL, these rules will lose.
So if users wantn't their replication filter rules lose, they should write the rules in my.cnf.

Users can set rules by 2 ways:
1. Online SET command, "SET connection_name.replication_filter_settings = rules;".
2. In my.cnf, "connection_name.replication_filter_settings = rules".

If no connection_name in my.cnf, this rule will apply for ALL replication connection.
If no connetion_name in SET statement, this rull will apply for default_connection_name.

The official Debian Wheezy MySQL packages have versions like 5.5.30+dfsg-xxx.
Such version is larger than 5.5.30-yyy, so apt prefers it.
So use instead 5.5.30+maria-yyy, which is larger and can be pulled in
automatically by apt.

Also included are a couple of fixes for test failures in buildbot.

Renamed the virtual method middle_point_pos for the class Field to
pos_in_interval.

Merge of 10.0-mdev26 feature tree into 10.0-base.

Global transaction ID is prepended to each event group in the binlog.

Slave connect can request to start from GTID position instead of specifying
file name/offset of master binlog. This facilitates easy switch to a new
master.

Slave GTID state is stored in a table mysql.rpl_slave_state, which can be
InnoDB to get crash-safe slave state.

GTID includes a replication domain ID, allowing to keep track of distinct
positions for each of multiple masters.