This is follow-up for commit 619d22dd
to fix the cmake -DWITH_EMBEDDED_SERVER build.

InnoDB includes 3 parsers, which use 3 lexical analyzers that
are generated with flex. Flex versions before 2.6 emitted
the keyword "register", which is deprecated in C++17.

The lexical analyzers were regenerated as follows:

for s in storage/innobase storage/xtradb
do
	(cd "$s"/pars; ./make_flex.sh)
	touch "$s"/fts/*.l
	make -C "$s"/fts -f Makefile.query
done

The MDEV-11738/MDEV-11581 fix was supposed to add the column
ROTATING_OR_FLUSHING to the INFORMATION_SCHEMA table
INNODB_TABLESPACES_ENCRYPTION, but it also added that column to
INNODB_TABLESPACES_SCRUBBING in InnoDB (not XtraDB).

The extra column was never initialized. We will remove it,
because key rotation has nothing to do with the scrubbing of
tablespace data.

This reverts commit 21b2fada
and commit 81d71ee6.

The MDEV-18464 change introduces a few data race issues. Contrary to
the documentation, the field trx_t::victim is not always being protected
by lock_sys_t::mutex and trx_t::mutex. Most importantly, it seems
that KILL QUERY could wrongly avoid acquiring both mutexes when
invoking lock_trx_handle_wait_low(), in case another thread had
already set trx->victim=true.

We also revert MDEV-12009, because it should depend on the MDEV-18464
fix being present.

As noted on kill_one_thread SUPER should be able to kill even
system threads i.e. threads/query flagged as high priority or
wsrep applier thread. Normal user, should not able to kill
threads/query flagged as high priority (BF) or wsrep applier
thread.

Pushed the decision for innodb transaction and system
locking down to lock0lock.cc level. With this,
we can avoid releasing these mutexes for executions
where these mutexes were acquired upfront.

This patch will also fix BF aborting of native threads, e.g.
threads which have declared wsrep_on=OFF. Earlier, we have
used, for innodb trx locks, was_chosen_as_deadlock_victim
flag, for marking inodb transactions, which are victims for
wsrep BF abort. With native threads (wsrep_on==OFF), re-using
was_chosen_as_deadlock_victim flag may lead to inteference
with real deadlock, and to deal with this, the patch has added new
flag for marking wsrep BF aborts only: victim=true

Similar way if replication decides to abort one of the threads
we mark victim by: victim=true

innobase_kill_query
	Remove lock sys and trx mutex handling.

wsrep_innobase_kill_one_trx
	Mark victim trx with victim=true

trx0trx.h
	Remove trx_abort_t type and abort type variable from
	trx struct. Add victim variable to trx.

wsrep_kill_victim
	Remove abort_type

lock_report_waiters_to_mysql
	Take also trx mutex and mark trx as a victim for
	replication abort.

lock_trx_handle_wait_low
	New low level function to check whether the transaction
	has already been rolled back because it was selected as
	a deadlock victim, or if it has to wait then cancel
	the wait lock.

lock_trx_handle_wait
	If transaction is not marked as victim take lock sys
	and trx mutex before calling lock_trx_handle_wait_low
	and release them after that.

row_search_for_mysql
	Remove lock sys and trx mutex taking and releasing.

trx_rollback_to_savepoint_for_mysql_low
trx_commit_in_memory
	Clean up victim variable.

MDEV-18466 Unsafe to log updates on tables referenced by foreign keys with triggers in statement format

ignore FK-prelocked tables when looking for write-prelocked tables
with auto-increment to complain about "Statement is unsafe because
it invokes a trigger or a stored function that inserts into an
AUTO_INCREMENT column"

special cases:

* change systemd detection to use CHECK_LIBRARY_EXISTS at least once,
  to have it detected by build_depends.cmake
* similarly, use find_library for pam
* unixODBC is weird, libodbc.so is in the unixODBC package, not
  in the unixODBC-devel, where normally all .so files belong.
  Packaging bug? As a workaround, use find_file(sql.h) instead of
  find_path(sql.h) to make sure that /usr/include/sql.h (not /usr/include)
  is cached by cmake, and later build_depends.cmake will select
  unixODBC-devel, as a package owning /usr/include/sql.h file.

automatic BuildRequires for source RPM: for every FILEPATH and
"Have library XXX" cached variable, detect what rpm package it comes from
and add it to the list of dependencies.

That is, the source RPM will BuildRequire all those packages that
were found by cmake when the source RPM was built. Presumably, our
CMakeLists.txt won't check for libraries that aren't needed for a build.

It supports libraries/executables/files found with
  FIND_LIBRARY
  FIND_FILE
  FIND_PROGRAM
  CHECK_LIBRARY_EXISTS

create source RPM cpack-way

when building binary packages, this source rpm will use
same BUILD_CONFIG and WITH_SSL values that were used when
creating the source RPM.

Only do it for a reasonably new cmake, where
source rpms are known to work (3.10.2 is ok, 3.5.2 is not).

And force a shorter CPACK_RPM_BUILD_SOURCE_DIRS_PREFIX so that
a source rpm could be built from a standard location in /usr/src

instead remove internal modules from Requires/Provides

add defensive $ for filenames, don't include .gitattributes
and *.rpm, correct rules for *.gz and *.zip

since long we use a different workaround, our own CPackRPM wrapper

now we can afford it. Fix -Werror errors. Note:
* old gcc is bad at detecting uninit variables, disable it.
* time_t is int or long, cast it for printf's

Fix mariabackup to crash if opening tablespace fails, insitead of
continuing after an error.

In a Ubuntu Xenial build environment, the compiler identified as
g++-5.real (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609
seems to be emitting incorrect code for the compilation unit
trx0rec.cc, triggering a bogus-looking AddressSanitizer report
of an invalid read of something in the function trx_undo_rec_get_pars().
This is potentially affecting any larger tests where the InnoDB
purge subsystem is being exercised.

When the optimization level of trx0rec.cc is limited to -O1, no
bogus failure is being reported. With -O2 or -O3, a lot of things
seemed to be inlined in the function, and the disassembly of the
generated code did not make sense to me.

select from I_S

Problem:
========
When applier thread tries to access 'variable_name' of
INFORMATION_SCHEMA.SESSION_VARIABLES table through triggers, it results in an
abnormal exit of slave server.

Analysis:
========
At the time of replication of stored routines and triggers, their associated
security context will be sent by the master. The applier thread on the slave
server will use this information to set the required security context for the
execution of stored routines and triggers. This is achieved as follows.

->The stored routine object has a member named 'm_security_ctx' which holds the
  security context received from master.
->The applier thread's security_ctx is stored into a 'backup' object.

->Set the applier thread's security_ctx to 'm_security_ctx'.

->Upon the completion of stored routine execution restore the original security
  context of applier thread from the backup.

During the above process the 'm_security_ctx' object is not initialized
properly. Hence the 'external_user' of 'm_security_ctx' has invalid value for
this variable and accessing this variable results in abnormal exit of server.

Fix:
===
Invoke the Security_context::init() call from the constructor of stored routine
so that 'm_security_ctx' gets initialized properly.

Item_cond::eval_not_null_tables(): Use Item::eval_const_cond(),
just like Item_cond::fix_fields().

This inconsistency was found while merging to 10.3, where the
Microsoft compiler is configured to report an error for comparing
longlong to bool.

Before MDEV-12113 (MariaDB Server 10.1.25), on shutdown InnoDB would write
the current LSN to the first page of each file of the system tablespace.
This is incompatible with MariaDB's InnoDB table encryption, because
encryption repurposed the field for an encryption key ID and checksum.

buf_page_is_corrupted(): For the InnoDB system tablespace, skip
FIL_PAGE_FILE_FLUSH_LSN when checking if a page is all zero,
because the first page of each file in the system tablespace can
contain nonzero bytes in the field.

By applying 7bd258c4.

unfortunately, the year 2038 problem prevented me from pushing
the deadline even further into the future.

The 'bitmap_dir' has to be closed when no longer needed

Simulate slow statements only for COM_QUERY and COM_STMT_EXECUTE commands,
to exclude mysqld_stmt_prepare() and mysqld_stmt_close() entries from the log,
as they are not relevant for log_slow_debug.test. This simplifies the test.

Fixed issue in logic.

The file will be closed on line 540

swap two lines

Corrected one more "refering" typo.