Refs #25 - made sure signals that may be set to ignored in mysqld were set to default in the child process.

 * improves MySQL client version check making it no less than required as opposed to exactly as required.
 * adds event table copying to ensure same results as with rsync SST.

Going more MTR-friendly - for SST prefer to use mysql client, mysqldump and my_print_defaults from the local build tree.

Merge fix to xtradb.

This bug is a side-effect of fix for MDEV-6924, where we completely
stopped a statement-based event from getting into the binlog cache when
binary logging is not enabled (and thus, wsrep_emulate_binlog mode = 1).
As a result, the SBR events were not replicated.

Fixed by allowing the SBR events to be written into the binlog cache.

Note: Only DMLs were affected as DDLs are replicated via TOI.

Merged galera_create_trigger.test from github.com/codership/mysql-wsrep.

Restore fix for MDEV-4328 (revno: 3391) that got accidentally
overwritten while merging :
http://bazaar.launchpad.net/~codership/codership-mysql/5.5-23/revision/3900

Added a test case.

wsrep threads should be always be checked for existence & stopped on
server shutdown.

Analysis: after a red-black-tree lookup we use node withouth
checking did lookup succeed or not. This lead to situation
where NULL-pointer was used.

Fix: Add additional check that found node from red-back-tree
is valid.

* Changed loopback detection to be done via ifa->ifa_flags
* Removed unused function wsrep_guess_address()

Merge banch 5.5 till revision :
fdd6c111 - MDEV-7419 Function cli_safe_read not exported

Conflicts:
	.bzrignore
	debian/dist/Debian/mariadb-galera-server-5.5.files.in
	debian/dist/Ubuntu/mariadb-galera-server-5.5.files.in
	storage/tokudb/CMakeLists.txt
	support-files/build-tags

Start the client API for low-level protocol access:
* unsigned long mysql_net_read_packet(MYSQL *mysql);
* unsigned long mysql_net_field_length(unsigned char **packet);

* fix /etc/init.d/mysql to use log-basename for pid-filename
* fix mysqld_safe not to force logging-to-file when log-basename is specified

include oqgraph into deb packages conditionally, just like we do with tokudb

Do not use merge_for_insert for commands which use SELECT because optimizer can't work with such tables.

Fixes which makes multi-delete working with normally merged views.

    When the distance in ST_BUFFER is too far negative the coordinates can run out of the operational
    area. We should just return an empty geometry in this case.

The testcase fails randomly due to ibuf merge happening in the background.
Fix not to do any merges with ibuf_debug enabled.

Previously IF NOT EXISTS was added in Debian version in revno 3543. 
Now added the same for Ubuntu.

MDEV-7435 Windows debug: Run-Time Check Failure #3 - The variable 'unused' is being used without being initialized.
Fixed as it's done in 10.0.

causes server crash

Analysis: If wrong data types used on foreign constraint there
was possibility that foreign->id is NULL when incorrect
foreign constraint was removed from the dictionary cache.

Fix: Add guard foreign->id != NULL before trying to lookup
or remove the foreign constraint from dictionary cache.

Tested using user database where problem was repeatable.