Link feedback plugin with yassl libraries, if with-ssl=bundled is used, since mysqld does not export SSL symbols anymore.

Compile yassl and taocrypt using -fvisibility=hidden, when possible.  This prevent symbols from being exported.

Fix some problems in the TC_LOG_MMAP commit processing, which could
lead to assertions in some cases.

Problems are mostly reproducible in MariaDB 10.0 with asynchroneous
commit checkpoints, but most of the problems were present in earlier
versions also.

followup fixes for MySQL Bug #13889741: HANDLE_FATAL_SIGNAL IN _DB_ENTER_ | HANDLE_FATAL_SIGNAL IN STRNLEN

Take into account that length of strings passed down to this function can be up to FN_REFLEN+1 bytes. including terminating zero.
The overwrite was caused by incomplete fix to MySQL Bug # 44834

If triggers are used for an insert/update/delete statement than the values of
all virtual columns must be computed as any of them may be used by the triggers.

add a test case for MySQL Bug #13889741: HANDLE_FATAL_SIGNAL IN _DB_ENTER_ | HANDLE_FATAL_SIGNAL IN STRNLEN

Made information_schema_all_engines stable by adding "sorted_result".

mysql-test/r/partition.result:
  Added test case
mysql-test/t/partition.test:
  Added test case
sql/ha_partition.cc:
  Removed printing of not initialized variable
storage/maria/ha_maria.cc:
  Don't copy variables that are not initialized

storage/maria/ma_test2.c:
  Problem was that rnd() generated bigger value than allocated array

Empty result after reading const tables now works for subqueries.

Check ability of index to be NULL as it made in MyISAM. UNIQUE with NULL could have several NULL entries so we have to continue even if ve have found a row.

 - Fix some warnings in newer GCC (-Werror ...).
 - Fix wrong STACK_DIRECTION detected by configure due to compiler inlining.