Interface for maria extensions.
  Alternative plugin interface with additional info (maturity and string version).

CMakeLists.txt:
  Maria plugin interface used.
config/ac-macros/plugins.m4:
  Maria plugin interface used.
configure.in:
  Maria plugin interface used.
include/mysql/plugin.h:
  Maria plugin interface added.
include/mysql/plugin_auth.h.pp:
  Maria plugin interface added.
plugin/auth/auth_socket.c:
  Maria plugin interface added.
plugin/auth/dialog.c:
  Maria plugin interface added.
plugin/daemon_example/daemon_example.cc:
  Maria plugin interface added.
plugin/fulltext/plugin_example.c:
  Maria plugin interface added.
sql/ha_ndbcluster.cc:
  Maria plugin interface added.
sql/ha_partition.cc:
  Maria plugin interface added.
sql/log.cc:
  Maria plugin interface added.
sql/sql_acl.cc:
  Maria plugin interface added.
sql/sql_builtin.cc.in:
  Maria plugin interface used.
sql/sql_plugin.cc:
  Maria plugin interface added.
sql/sql_plugin.h:
  Maria plugin interface used.
sql/sql_show.cc:
  Maria plugin interface added.
storage/archive/ha_archive.cc:
  Maria plugin interface added.
storage/blackhole/ha_blackhole.cc:
  Maria plugin interface added.
storage/csv/ha_tina.cc:
  Maria plugin interface added.
storage/example/ha_example.cc:
  Maria plugin interface added.
storage/federated/ha_federated.cc:
  Maria plugin interface added.
storage/federatedx/ha_federatedx.cc:
  Maria plugin interface added.
storage/heap/ha_heap.cc:
  Maria plugin interface added.
storage/ibmdb2i/ha_ibmdb2i.cc:
  Maria plugin interface added.
storage/innobase/handler/ha_innodb.cc:
  Maria plugin interface added.
storage/innodb_plugin/handler/i_s.cc:
  Maria plugin interface added.
storage/maria/ha_maria.cc:
  Maria plugin interface added.
storage/myisam/ha_myisam.cc:
  Maria plugin interface added.
storage/myisammrg/ha_myisammrg.cc:
  Maria plugin interface added.
storage/pbxt/src/ha_pbxt.cc:
  Maria plugin interface added.
storage/xtradb/handler/ha_innodb.cc:
  Maria plugin interface added.
storage/xtradb/handler/i_s.cc:
  Maria plugin interface added.
storage/xtradb/handler/i_s.h:
  Maria plugin interface added.

Fixed valgrind warnings found from running main.connect under valgrind


sql/sp_head.cc:
  Ensure that vcol_info is reset
sql/sql_acl.cc:
  Fixed usage of wrong memroot for password
sql/sql_yacc.yy:
  Ensure that vcol_info is reset

Fixed compiler warnings

mysys/my_gethostbyname.c:
  Added missing space from last push
storage/xtradb/handler/i_s.cc:
  Removed not used variable
storage/xtradb/log/log0recv.c:
  Removed not used variable

Fixed random failure in test system

BUILD/compile-solaris-sparc:
  Addex EXTRA_FLAGS to configure line (to get rid of warnings for not initialzed variables on buildbot)
cmd-line-utils/libedit/filecomplete.c:
  Remove not used variables
mysql-test/suite/rpl/r/rpl_optimize.result:
  Updated result
mysql-test/suite/rpl/t/rpl_optimize.test:
  Use sync_salve_with_master to ensure cleanup on slave
support-files/compiler_warnings.supp:
  Added suppression of libedit files

include/m_ctype.h:
  MY_UNICASE_INFO already includes 'const'
plugin/auth/dialog.c:
  Fixed parameters to have correct signed/unsigned type
sql/sql_acl.cc:
  old_password_plugin is not used for EMBEDDED_LIBRARY
storage/pbxt/src/ha_pbxt.cc:
  Remove not used variable

Disable pbxt for test cases not using pbxt (speeds up test suite)

extra/comp_err.c:
  Added cast to get rid of compiler warning
extra/libevent/kqueue.c:
  Added cast to get rid of compiler warning
mysql-test/lib/mtr_cases.pm:
  Use --skip-pbxt for test cases that doesn't need pbxt
  Collect default-storage-engine from suite.opt file (should actually be my.cnf file, but that wasn't easy to do)
mysql-test/suite/pbxt/t/suite.opt:
  Added marker for mysql-test-run.pl that this suite require pbxt
mysys/mf_keycache.c:
  Use LINT_INIT() to remove compiler warnings
mysys/my_gethostbyname.c:
  Remove compiler warnings
sql/handler.cc:
  Reset variable that may be used uninitialized
sql/item.h:
  Remove compiler warning
sql/mysqld.cc:
  Use LINT_INIT() to remove compiler warnings
sql/sql_class.h:
  Remove compiler warning
sql/sql_table.cc:
  Ensure variable is always set (to remove compiler warning)
sql/sql_view.cc:
  Use LINT_INIT() to remove compiler warnings
storage/maria/ma_loghandler.c:
  Use LINT_INIT() to remove compiler warnings
storage/myisammrg/ha_myisammrg.cc:
  Fixed wrong type to printf
storage/myisammrg/myrg_open.c:
  Use LINT_INIT() to remove compiler warnings
storage/xtradb/include/ut0lst.h:
  Trivial change of macro to remove compiler warning
strings/ctype-ucs2.c:
  Use LINT_INIT() to remove compiler warnings
strings/ctype-utf8.c:
  Use LINT_INIT() to remove compiler warnings
support-files/compiler_warnings.supp:
  Suppress some not relevant warnings
unittest/mysys/waiting_threads-t.c:
  Don't use ftruncate() as this gives warning about ignored return value

storage/maria/ma_loghandler.c:
  compiler warnings removed.

storage/maria/ma_loghandler.c:
  Remove compiler warning.

Removed and suppressed compiler warnings


mysql-test/suite/parts/t/rpl_partition.test:
  Mark as big test (as test takes > 5 minutes)
mysql-test/suite/rpl/t/rpl_row_trig003.test:
  Fixed random failure
sql/item_create.cc:
  Renamed create -> create_builder() to avoid compiler warnings about function hidden by others
sql/net_serv.cc:
  Removed compiler warning
support-files/compiler_warnings.supp:
  Supress some warnings
  Remove suppresstion from set_var.cc, as this has already been fixed
  Added missing \ before .c
  Added suppression of warnings that are due to gcc bug (.*discards qualifiers from pointer target type.*)

configure: WARNING: unrecognized options: --without-plugin-xxx

Makefile.am:
  add new API files to the check_abi rule,
  remove duplicates
client/CMakeLists.txt:
  now a client can use dlopen too
client/Makefile.am:
  be csh-friendly
include/my_global.h:
  add dummy plugs for dlopen and co.
  for the code that needs them to work in static builds
mysys/Makefile.am:
  be csh-friendly
plugin/auth/dialog.c:
  typo fixed

mysql-test/extra/rpl_tests/rpl_tmp_table_and_DDL.test:
  Added missing sync_slave_with_master; Fixes random failures
mysql-test/include/default_mysqld.cnf:
  default-character-set -> character-set-server (removes warning in error files for usage of deprecated options)
mysql-test/lib/My/SafeProcess/safe_process.cc:
  Fixed compiler warning
mysql-test/lib/v1/mysql-test-run.pl:
  default-character-set -> character-set-server (removes warning in error files for usage of deprecated options)
mysql-test/suite/rpl/r/rpl_do_grant.result:
  Updated test results
mysql-test/suite/rpl/t/rpl_do_grant.test:
  Added missing sync_slave_with_master; Fixes random failures
  Had to explictely do stop slave before DROP USER to avoid failure on slave as the user is already dropped on slave.
mysql-test/suite/rpl/t/rpl_name_const.test:
  Added missing sync_slave_with_master; Fixes random failures
mysql-test/suite/rpl/t/rpl_row_basic_11bugs.test:
  Added missing sync_slave_with_master; Fixes random failures
mysql-test/t/bug47671-master.opt:
  default-character-set -> character-set-server (removes warning in error files for usage of deprecated options)
mysql-test/t/ctype_latin1_de-master.opt:
  default-character-set -> character-set-server (removes warning in error files for usage of deprecated options)
mysql-test/t/ctype_ucs2_def-master.opt:
  default-character-set -> character-set-server (removes warning in error files for usage of deprecated options)
sql-common/client.c:
  Fixed compiler warning
sql/item.cc:
  Renamed function to remove compiler warnings (with gcc)
sql/item.h:
  Renamed function to remove compiler warnings (with gcc)
sql/item_cmpfunc.cc:
  Renamed function to remove compiler warnings (with gcc)
sql/item_create.cc:
  Renamed function to remove compiler warnings (with gcc)
sql/item_create.h:
  Renamed function to remove compiler warnings (with gcc)
sql/item_sum.cc:
  Renamed function to remove compiler warnings (with gcc)
sql/item_sum.h:
  Renamed function to remove compiler warnings (with gcc)
sql/set_var.cc:
  Don't use bit_do_set() / bot_is_set() / bit_do_clear() as this generates compiler warnings
  (They are also of no use as we know the value can hold the bits)
sql/sql_yacc.yy:
  Renamed function to remove compiler warnings (with gcc)
storage/example/ha_example.h:
  Fixed old read_time() prototype
storage/maria/ma_search.c:
  Added extra variables to remove compiler warnings
storage/maria/maria_def.h:
  Added extra variables to remove compiler warnings
storage/myisam/ft_stopwords.c:
  Added cast to get rid of compiler warning
storage/xtradb/fil/fil0fil.c:
  Added cast to get rid of compiler warning
storage/xtradb/include/page0page.h:
  Added const to get rid of compiler warning
storage/xtradb/include/page0page.ic:
  Added const to get rid of compiler warning
support-files/compiler_warnings.supp:
  Added suppression of strict-aliasing

1. don't forget to initialize page->ptr
2. don't signal active->cond, if active is NULL

2. don't copy st_mysql_plugin structure unnecessary (sizeof hasn't changed)

storage/myisam/mi_create.c:
  Don't set HA_OPTION_NULL_FIELDS if table is not using CHECKSUM as this makes the table incompatible with MySQL.

- Now DELETE IGNORE skips over rows with a foreign key constraints (as it was supposed to do)


mysql-test/r/foreign_key.result:
  Test case for Bug#44987 DELETE IGNORE and FK constraint
mysql-test/t/foreign_key.test:
  Test case for Bug#44987 DELETE IGNORE and FK constraint
sql/sql_delete.cc:
  Firx for Bug#44987 DELETE IGNORE and FK constraint
  Now DELETE IGNORE skips over rows with a foreign key constraints (as it was supposed to do)
  Bug fix inspired by: Moritz Mertinkat

Add some extra error output and code cleanup in an attempt to fix/debug
a rare random testsuite problem in check_warnings, where the exit code
from mysqltest is somehow corrupted inside mysql-test-run.pl.

include/my_global.h:
  Fix compiler warnings on some platforms.
mysql-test/lib/My/SafeProcess.pm:
  Move dereference of $? subprocess exit code closer to where it is generated,
  to make the code more robust and on the chance that this will fix the
  occasional problems in check_warnings we see in Buildbot.
mysql-test/mysql-test-run.pl:
  When check_warnings failed, also log the mysqld server for which it failed.
sql/sql_lex.cc:
  Fix compiler warning about possibly uninitialised value, by rewriting a for()
  loop that is always executed at least once into a do .. while() loop with an
  assert.
sql/table.cc:
  Fix compiler warning about uninitialised value.
storage/federatedx/ha_federatedx.cc:
  Fix uninitialised variable.
storage/maria/ma_delete.c:
  Fix compiler warning about uninitialised value.
storage/maria/ma_loghandler.c:
  Fix compiler warning about uninitialised value.
storage/myisam/ft_stopwords.c:
  Fix compiler warning.
storage/myisam/mi_write.c:
  Fix compiler warning about possibly uninitialised value, by rewriting a while()
  loop that is always executed at least once into a do .. while() loop with an
  assert.
storage/xtradb/btr/btr0cur.c:
  Fix compiler warning about possibly uninitialised value.
support-files/compiler_warnings.supp:
  Fix warning suppression to cover all cases in yassl.
vio/viossl.c:
  Fix compiler warning.

 - Adjust timing in test case, to avoid test failures caused by high load
   on machines and consequent race conditions in the test case.

 - Add another variant of Valgrind suppressions for memory leak in system
   libraries when unloading dynamic object files.


mysql-test/r/information_schema.result:
  Adjust timing to avoid test failures due to races.
mysql-test/t/information_schema.test:
  Adjust timing to avoid test failures due to races.
mysql-test/valgrind.supp:
  Add another variant of valgrind suppression for leak in system libs.

query:
- When subquery is located in ORDER BY, EXPLAIN will run as follows:
  select_describe() will run JOIN::prepare()/optimize() for the subquery;
  then at some point subselect_single_select_engine::prepare() will be called,
  which will create another join and run join->prepare().

  In mainline mysql this is not a problem because subquery's join will be 
  destroyed after the first call. 
  In MariaDB, it won't (table elimination needs to keep JOIN objects around
  for longer in order to know which tables were eliminated when constructing
  EXPLAIN EXTENDED warning).

  Fix the problem of memory leak by calling select_lex->cleanup() in 
  subselect_single_select_engine::prepare().

tmp_table_size can now be set to 0 (to disable in memory internal temp tables)
Improved speed for internal Maria temp tables:
- Don't use packed keys, except with long text fields.
- Don't copy key all accessed pages during key search.
Some new benchmark tests to sql-bench (for group by)

BUILD/compile-pentium64-gcov:
  Update script to use same pentium_config flags as other tests
BUILD/compile-pentium64-gprof:
  Update script to use same pentium_config flags as other tests
include/my_sys.h:
  Added count of my_sync calls
mysql-test/r/variables.result:
  tmp_table_size can now be set to 0
sql-bench/test-select.sh:
  Added some new test for GROUP BY on a not key field and group by with different order by
sql/mysqld.cc:
  Added count of my_sync calls
  tmp_table_size can now be set to 0 (to disable in memory internal temp tables)
sql/sql_select.cc:
  If tmp_table_size is 0, don't use in memory temp tables (good for benchmarking MyISAM/Maria temp tables)
  Don't pack keys for Maria tables;  The 8K page size makes packed keys too slow for temp tables.
storage/maria/ma_key_recover.h:
  Moved definition to maria_def.h
storage/maria/ma_page.c:
  Moved code used to simplify comparing of identical Maria tables to own function (page_cleanup())
  Fixed that one can read a page with a read lock.
storage/maria/ma_rkey.c:
  For not exact key reads, cache the page where we found key (to speed up future read-next/read-prev calls)
storage/maria/ma_search.c:
  Moved code to cache last key page to separate function.
  Instead of copying pages, only get a link to the page. This notable speeds up key searches on bigger tables.
storage/maria/ma_write.c:
  Added comment
storage/maria/maria_def.h:
  Moved page_cleanup() to separate function.

Bug#46949: memory leak with failed alter table to create partitions based on extract()

Bug#51830: Incorrect partition pruning on range partition (regression)

Fixed valgrind failure in select_describe(), read of uninitialized 
  Item_subselect::eliminated.

PBXT test file updates to reflect changes done in MySQL.

mysql-test/suite/pbxt/r/partition_error.result:
  Result file update following MySQL 5.1.44 changes.
mysql-test/suite/pbxt/r/partition_pruning.result:
  Result file update following MySQL 5.1.44 changes.
mysql-test/suite/pbxt/t/partition_error.test:
  Test file update following MySQL 5.1.44 changes.
sql/item_subselect.cc:
    Fixed valgrind failure in select_describe(), read of uninitialized 
    Item_subselect::eliminated: 
    - it turns out we can call select_describe() without having fixed 
      subquery items for child subselects. These are not the kind of subqueries
      that we could eliminate, so the fix is to ensure that 
      item_subselect->eliminated==FALSE even before fix_fields is called.
      Also added code to reset item_subselect->eliminated back to FALSE in
      Item::reset() call.
sql/item_subselect.h:
    Fixed valgrind failure in select_describe(), read of uninitialized 
    Item_subselect::eliminated: 
    - it turns out we can call select_describe() without having fixed 
      subquery items for child subselects. These are not the kind of subqueries
      that we could eliminate, so the fix is to ensure that 
      item_subselect->eliminated==FALSE even before fix_fields is called.
      Also added code to reset item_subselect->eliminated back to FALSE in
      Item::reset() call.
sql/sql_partition.cc:
  Fix Bug#51830: Revert part of the patch for Bug#49742, which caused the regression.
sql/table.cc:
  Fix Bug#46949: memory leak in failed ALTER TABLE with partitioning.

Save no-records constant tables in JOIN::const_table_map before we invoke
eliminate_tables(). Failure to do so caused crash when the same table was
marked as constant two times

mysql-test/r/table_elim.result:
  LPBUG#524025 Running RQG outer_join test leads to crash
  - Testcase
mysql-test/t/table_elim.test:
  LPBUG#524025 Running RQG outer_join test leads to crash
  - Testcase
sql/sql_select.cc:
  LPBUG#524025 Running RQG outer_join test leads to crash
  Save no-records constant tables in JOIN::const_table_map before we invoke eliminate_tables(). Failure to do so caused crash when the same table was marked as constant two times.

(Problem was missing time_zone setting)

don't set breakpoints automatically, it was needed many years ago but not anymore