Fix failure seen on dict_foreign_remove_partial.

GEOMETRY_COLUMNS and SPATIAL_REF_SYS tables added to the INFORMATION_SCHEMA.

type and that we decompress fist page if it is page compressed
before really accessing it.

The method subselect_union_engine::no_rows() must take
into account the fact that now unit->fake_select_lex is
NULL for for select_union_direct objects.

Add testcase.

Make log_slow_verbosity=explain actually print ANALYZE (that
is, EXPLAIN otuput with two extra columns).

Make ANALYZE work for
- ANALYZE SELECT ... INTO @var
- ANALYZE INSERT SELECT ...;
- ANALYZE SELECT .. INTO OUTFILE

Although the original code of mysql-5.7 was adjusted
to the current MariaDB code the main ideas of the optimization
were preserved.

Added API for atomic operations with explicit memory barrier. Only gcc
atomic builtins are currently supported. If they're unavailable, fall
back to atomic operations with implicit full memory barrier.

Add ANALYZE STMT handling into INSERT command.

remove:
* NDB from everywhere
* IM from mtr-v1
* packaging/rpm-oel and packaging/rpm-uln
* few unused spec files
* plug.in file
* .bzrignore

TOTAL_SSL_CONNECTIONS columns in CLIENT_STATISTICS and USER_STATISTICS

Extend existing plugins to support
* SHOW QUERY_RESPONSE_TIME
* FLUSH QUERY_RESPONSE_TIME
* SHOW LOCALE

move userstat tables to use the new API instead of
hand-coded syntax

INFORMATION_SCHEMA.SYSTEM_VARIABLES