MDEV-5839 TokuDB tables not properly cleaned on DROP DATABASE

TokuDB does not support discover_table_names() and writes no files
in the database directory, so automatic filename-based
discover_table_names() doesn't work either. So, it must force .frm
file to disk in ::create()

Don't abort plugin reads whem mpvio->make_it_fail is set - this can leak information.

Rename back my_init_dynamic_array2() -> init_dynamic_array2()
It happens to be a part of the de facto API :(

MDEV-5955 Server crashes in handler::ha_external_lock or assertion `m_lock_type == 2' fails in handler::ha_close on disconnect with a locked temporary table

first unlock locked tables, then close and remove temporary

The reason was that a couple of variables that hold number of rows that was used to calculate buffers was uint and caused an overflow.

Fixed by changing variables that could hold number of rows from uint to ulong and also added a cast for this test.

include/heap.h:
  Reorder to get better alignment. Changed variables that could hold number of rows from uint to ulong
mysql-test/suite/heap/heap.result:
  Added test case
mysql-test/suite/heap/heap.test:
  Added test case
mysql-test/suite/plugins/t/server_audit.test:
  Added sleep as we want to have disconnect logged before we try a new connect
storage/heap/ha_heap.cc:
  Changed variables that could hold number of rows from uint to ulong
  Limit number of rows to 4G  (as most of the variables that holds rows are ulong anyway)
  reset records_changed when key_stat_version is changed to not cause increments for every row changed
storage/heap/ha_heap.h:
  changed records_changed to ulong as this can get big
storage/heap/hp_create.c:
  Changed variables that could hold number of rows from uint to ulong
  Added cast (fixed the original bug)
storage/heap/hp_delete.c:
  Changed variables that could hold number of rows from uint to ulong
storage/heap/hp_open.c:
  Removed not needed cast
storage/heap/hp_write.c:
  Changed variables that could hold number of rows from uint to ulong
support-files/compiler_warnings.supp:
  Removed extra : from supression

MDEV-5920 MySQL Bug#16765410 FTS: STACK AROUND THE VARIABLE 'MYSTR' WAS CORRUPTED IN INNOBASE_STRNXFRM

MDEV-5861 MySQL Bug#12601974 - STORED PROCEDURE SQL_MODE=NO_BACKSLASH_ESCAPES IGNORED AND BREAKS REPLICATION

escape usernames in CREATE/DROP USER error messages according to NO_BACKSLASH_ESCAPES

simplify the prototype and move it to sql_string.h

  use LEX_STRING, keep similar functions together, remove duplicated code

field list, it doesn't work if ALTER TABLE has replaced all fields.
Instead, pass the correct original table name down from the caller.

from the variable @@session.tokudb_row_format

MDEV-5815 MySQL BUG#11751736: DROP DATABASE STATEMENT SHOULD REMOVE .OLD SUFFIX FROM DATABASE DIRECTORY

Delete .OLD and .TMD files when a MyISAM table is dropped.
Same for Aria.

sql/sql_db.cc:
  dead code - *.TMD cannot be deleted from here.

previous file->index_next (or other file->... index access method)
succeeded

in the libmysqlclient_16 version node.

add pthread_mutex_destroy(&THR_LOCK_dbug); that was apparently
forgotten since the very first MySQL version

error message (because error messages use replacements)

for new tables

checks that can skip the test

Allow "rpm -q --whatprovides mysql-server" to return more than one row.
(all rows should be identical though)

support-files/rpm/server-prein.sh:
  don't use "head -1" or "uniq" to avoid introducing new dependencies.
  "sed" is already used in this script.

MDEV-5783 Assertion `0' failed in make_sortkey(SORTPARAM*, uchar*, uchar*) on ORDER BY HEX( UNCOMPRESSED_LENGTH( pk ) )

just as in 5.6 fix - copy the correct null-handling code from MyISAM

MDEV-5823 MySQL bug#11760213-52599: ALTER TABLE REMOVE PARTITIONING ON NON-PARTITIONED TABLE CORRUPTS MYISAM

add the test case only

MDEV-5849 MySQL bug#12602983 - User without privilege on routine can discover its existence by executing "select non_existing_func();" or by "call non_existing_proc()"

add or move privilege checks before existence checks

don't use mysql-5.6 change.
correct fix: zero-out rounded tail after the number was shifted because
of the carry digit (otherwise the carry digit will be zeroed out too).

revert the fix for MDEV-5549, use a different approach.

MDEV-5773 symbol list_add, version libmysqlclient_18 not defined in file libmysqlclient.so.18 with link time reference
MDEV-5763 libmyodbc.so: undefined symbol: int2str
MDEV-5739 Symbol missing in libmysqlclient.so.18 (make_scrambled_password)

pam_mysql and especially myodbc need tons of internal symbols on Debian, argh!

Don't try to be smart about --socket.
Assume that if user has set up a non-standard location for a socket,
she did it consistently for both a server and clients
(otherwise most clients won't work anyway).

        The RTLD_DEFAULT value on Labrador machine is not NULL,
        so the dlsym() commands in the server_audit just fail
        to bind the necessary functions.
        Fixed by using RTLD_DEFAULT explicitly.