Fixing post push test issues.

Recorded the result files for following:
rpl_stm_drop_create_temp_table.result
rpl_mixed_drop_create_temp_table.result.

The function pointer ut_timer() was only used by the
InnoDB defragmenting thread. Let InnoDB use a single monotonic
high-precision timer, my_interval_timer() [in nanoseconds],
occasionally wrapped by microsecond_interval_timer().

srv_defragment_interval: Change from "timer" units to nanoseconds.

This concludes the InnoDB time function cleanup that was
motivated by MDEV-14154. Only ut_time_ms() will remain for now,
wrapping my_interval_timer().

MDEV-5589 commit set up a policy to skip DROP TEMPORARY TABLE binary logging
in case the target table has not been "CREATEed" in binlog (no CREATE
Query-log-event was logged into the binary log).

It turns out that

1. the rule did not cover non-existing table DROPped with IF-EXISTS clause.
   The logged-create knowledge for the non-existing one does not even need
   MDEV-5589 patch, and

2. connection close disobeys it to trigger automatic DROP-IF-EXISTS
   binlogging.

Either 1 or 2 or even both is/are also responsible for unexpected binlog
records observed in MDEV-17863, actually rendering a referred
@@global.read_only irrelevant as far as the described stored procedure
definition *and* the ROW binlog-format are concerned.

The FTS optimizer thread made a false assumption that time(NULL)
is monotonic. The system clock can be adjusted to the past,
for example if the hardware clock was drifting to the future,
and it was adjusted by NTP.

fts_slot_t::interval_time: Replace with the constant
FTS_OPTIMIZE_INTERVAL_IN_SECS.

fts_slot_t::last_run, fts_slot_t::completed: Clarify the
documentation.

fts_optimize_get_time_limit(): Remove a type cast, and
add a FIXME comment about domain mismatch.

fts_optimize_compact(), fts_optimize_words(): Limit the time
also when the current time has been moved to the past.

fts_optimize_table_bk(): Check for wrap-around.

fts_optimize_how_many(): Check for wrap-around, and remove the
failing assertions.

fts_is_sync_needed(): Remove a redundant call to time(NULL).

lock_t::requested_time: Document what the field is used for.

lock_t::wait_time: Document that the field is only used for
diagnostics and may be garbage if the system time is being adjusted.

srv_slot_t::suspend_time: Document that this is duplicating
trx_lock_t::wait_started.

lock_table_print(), lock_rec_print(): Declare in static scope.
Add a parameter for the current time.

lock_deadlock_check_and_resolve(), lock_deadlock_lock_print(),
lock_deadlock_joining_trx_print():
Add a parameter for the current time.

srv_slot_t::suspend_time, os_aio_slot_t::reservation_time,
sync_cell_t::reservation_time: Explain what could happen
if the system time has is being adjusted.

fts_sync_t::start_time: Document that the field is mostly unused.

This affects the function has_higher_priority() for internal or
recovered transactions.

Replace ut_usectime() with my_interval_timer(),
which is equivalent, but monotonically counting nanoseconds
instead of counting the microseconds of real time.

os_event_wait_time_low(): Use my_hrtime() instead of ut_usectime().

FIXME: Set a clock attribute on the condition variable that allows
a monotonic clock to be chosen as the time base, so that the wait
is immune to adjustments of the system clock.

Use microsecond_interval_timer()
or my_interval_timer() [in nanoseconds] instead.

Analysis
========
Point in time recovery using mysqlbinlog containing queries
operating on temporary tables results in an error.

While writing the query log event in the binary log, the
thread id used for execution of DROP TABLE and DELETE commands
were incorrect. The thread variable 'thread_specific_used'
is used to determine whether a specific thread id is to used
while executing the statements i.e using 'SET
@@session.pseudo_thread_id'. This variable was not set
correctly for DROP TABLE query and was never set for DELETE
query. The thread id is important for temporary tables
since the tables are session specific. DROP TABLE and DELETE
queries executed using a wrong thread id resulted in errors
while applying the queries generated by mysqlbinlog utility.

Fix
===
Set the 'thread_specific_used' THD variable for DROP TABLE and
DELETE queries.

ReviewBoard: 21833

Note: this patch is for 5.6.

Detected by ASAN.

The patch fixes the cleanup of parser stack pointers.
Reviewed-by: Guilhem Bichot <guilhem.bichot@oracle.com>

check_valid_path() uses my_strcspn() that cannot handle invalid characters
properly. This is fixed by a big refactoring in 10.2 (MDEV-6353).

For 5.5, let's simply swap tests, because check_string_char_length()
rejects invalid characters just fine.

Description:- During server startup, the server exits if
the 'mysql.plugin' system table has any rows with empty
value for the field 'name' (plugin name).

The xpath parsing function was using a local string buffer that was
deallocated when going out of scope. However references to it are
preserved in the XPATH parse tree. This was causing read-after-free.

Fixed by making the xpath buffer a local variable inside the Item
class for the relevant xpath function, thus being preserved for the
duration of the query.

DESCRIPTION
===========
PVS-Studio static code analyzer found several suspicious
fragments of code across various files.

i)   sizeof() is using the pointer
ii)  memcpy() doesn't copy the whole string.
iii) enumeration constant 'wkb_multilinestring' is used as
     a variable of a Boolean-type.
iv) 'throw' keyword is missing from std::runtime_error()

FIX
===
i)   Use sizeof({actual object/data type})
ii)  Use strncpy() and set last char as '\0'
iii) N/A (Issue has already been fixed)
iv)  Add 'throw' before the exception.

RB: 21502

This is motivated by PS-5221 in
percona/percona-server@2817c561fce9e20a83b13272ac45fd333467715d

The coarser-precision ut_time() will still refer to the
system clock, meaning that bad things can happen if the
real time clock is adjusted backwards.

Valgrind started supporting CRC32 instruction starting with version
3.6.1, released in 2011. Thus remove the fallback to software
implementation in case running under Valgrind.

There is one directly applicable change to InnoDB:
commit 739f5239 in the
5.5 branch will be merged before the next MariaDB releases.

Another potentially applicable change will be tracked
separately as MDEV-20126.

Thus, here we only update the InnoDB version number and do
not change anything else.

This is follow-up to d36c107a

Follow-up to 07ba5560:
Use the correct 64-bit type name ulonglong instead of ulint,
like in mysql/mysql-server@4e0100d86b1b46be0107ebd46a98a0c2dbb0fab4

Problem: Clients running different values for auto_increment_increment
and doing concurrent inserts leads to "Duplicate key error" in one of them.

Analysis:
When auto_increment_increment value is reduced in a session,
InnoDB uses last auto_increment_increment value
to recalculate the autoinc value.
In case, some other session has inserted a value
with different auto_increment_increment, InnoDB recalculate
autoinc values based on current session previous auto_increment_increment
instead of considering the auto_increment_increment used for last insert
across all session

Fix:
revert 7acdf29c
a.k.a. 7c12a9e5
as it causing the bug.

Reviewed By:
Bin <bin.x.su@oracle.com>
Kevin <kevin.lewis@oracle.com>
RB#21777

Note: In MariaDB Server, earlier changes in
ae5bc059
for MDEV-533 require that the original test in
mysql/mysql-server@1ccd472d63a042d3237a55f5827239164219ef7e
be adjusted for MariaDB.

Also, ef47b625 (MDEV-8827)
had to be reverted after the upstream fix had been backported.

This reverts commit ef47b625.
The parent commit 07ba5560
which is a backport of
mysql/mysql-server@1198267c331b045b9cad26be72b1a5b4f8930a79
fixes the issue differently.

Problem:
=======
Autoincrement value gives duplicate values because of the following reasons.

(1) In InnoDB handler function, current autoincrement value is not changed
based on newly set auto_increment_increment or auto_increment_offset variable.

(2) Handler function does the rounding logic and changes the current
autoincrement value and InnoDB doesn't aware of the change in current
autoincrement value.

Solution:
========
Fix the problem(1), InnoDB always respect the auto_increment_increment
and auto_increment_offset value in case of current autoincrement value.
By fixing the problem (2), handler layer won't change any current
autoincrement value.
Reviewed-by: Jimmy Yang <jimmy.yang@oracle.com>
RB: 13748

This is a regression due to MDEV-16515 that affects some versions in
the MariaDB 10.1 server series starting with 10.1.35, and possibly
all versions starting with 10.2.17, 10.3.8, and 10.4.0.

The idea of MDEV-16515 is to allow DROP TABLE to be interrupted,
in case it was stuck due to some concurrent activity. We already
made some cases of internal DROP TABLE immune to kill in MDEV-18237,
MDEV-16647, MDEV-17470. We must include the cleanup of
CREATE TABLE...SELECT in the list of such internal DROP TABLE.

ha_innobase::delete_table(): Pass create_failed=true if the current
SQL statement is CREATE, so that the table will be dropped.

row_drop_table_for_mysql(): If create_failed=true, do not allow
the operation to be interrupted.

reported by lixtelnis

Check EXISTS LIMIT before rewriting.