create st_maria_plugin declarations of new xtradb I_S tables

* remove handler::index_read_last()
* create handler::keyread_read_time() (was get_index_only_read_time() in opt_range.cc)
* ha_show_status() allows engine's show_status() to fail
* remove HTON_FLUSH_AFTER_RENAME
* fix key_cmp_if_same() to work for floats and doubles
* set table->status in the server, don't force engines to do it
* increment status vars in the server, don't force engines to do it

mysql-test/r/status_user.result:
  correct test results - innodb was wrongly counting internal
  index searches as handler_read_* calls.
sql/ha_partition.cc:
  compensate for handler incrementing status counters -
  we want to count only calls to underlying engines
sql/handler.h:
  inline methods moved to sql_class.h
sql/key.cc:
  simplify the check
sql/opt_range.cc:
  move get_index_only_read_time to the handler class
sql/sp.cc:
  don't use a key that's stored in the record buffer -
  the engine can overwrite the buffer with anything, destroying the key
sql/sql_class.h:
  inline handler methods that need to see THD and TABLE definitions
sql/sql_select.cc:
  no ha_index_read_last_map anymore
sql/sql_table.cc:
  remove HTON_FLUSH_AFTER_RENAME
sql/table.cc:
  set HA_CAN_MEMCMP as appropriate
sql/tztime.cc:
  don't use a key that's stored in the record buffer -
  the engine can overwrite the buffer with anything, destroying the key
storage/myisam/ha_myisam.cc:
  engines don't need to update table->status or use ha_statistic_increment anymore
storage/myisam/ha_myisam.h:
  index_read_last_map is no more

mysql-test/suite/pbxt/r/mysqlshow.result:
  update the forgotten test results
sql/table.cc:
  add defensive asserts.
  fix the code that didn't in MySQL > 5.2.0 with frm's created before 5.1.10

Fixed failing test innodb.innodb-autoinc.test
Enabled innodb test suite

mysql-test/mysql-test-run.pl:
  Enabled innodb test suite
mysql-test/r/innodb-autoinc.result:
  Removed test as it exists in suite innodb
mysql-test/suite/innodb/t/disabled.def:
  Removed innodb-autoinc
mysql-test/suite/innodb/t/innodb-autoinc.test:
  Update to be able to run with plugin
mysql-test/t/innodb-autoinc.test:
  Removed test as it exists in suite innodb
sql/filesort.cc:
  Removed not used variable
sql/slave.cc:
  Remove compiler warnings
storage/pbxt/src/ha_pbxt.cc:
  Removed not used variable
storage/xtradb/dict/dict0crea.c:
  Fixed compiler warning about unsigned comparison
support-files/compiler_warnings.supp:
  Disable some not relevant warnings

include/Makefile.am:
  Make my_valgrind.h global (as it's used by my_global.h)
include/my_global.h:
  Include my_valgrind.h
include/my_sys.h:
  TRASH() moved to my_valgrind.h
include/my_valgrind.h:
  Add VALGRIND defines to mark memory
mysys/my_alloc.c:
  Mark internal freed memory as undefined

storage/pbxt/src/ha_pbxt.cc:
  LOCK_plugin is not locked anymore as part of plugin initialization

Fixed some bugs introduced in 5.1.47
Disabled some tests until we have merged with latest Xtradb

configure.in:
  Added testing if valgrind/memcheck.h exists
storage/pbxt/src/ha_pbxt.cc:
  LOCK_plugin is not anymore locked in init

Bug #39022: completed
Bug #39653: reverted as invalid
Bug #45640: ameliorated, simplified, optimized
Bug #48483: completed
Bug #49324: improved
Bug #51242/52336: reverted, applied a real fix.

Fix a couple of problems in the pack script, and disable a check feature that doesn't work right now

and the server suddenly goes away

The statistics after a sequence of inserts/deletes are updated asynchronously
in PBXT, causing unpredictable test results. Fix by running the test on a
fresh copy of the table with no deletes performed, to get stable results.

1. fix broken change user handling (no restart should happen in the normal case)
2. add assert to guarantee that we never send a request to change to the same plugin
3. "fix" plugin string as sent by the client to be able to compare native plugins by pointers
4. more complete MYSQL initialization in the embedded case
5. change_user.test updated to handle -with-embedded-privilege-control builds

Add a -nobuild argument to the script. Useful for building the zip file release with Express Edition which doesn't have the devenv command

mysql-test/suite/binlog/r/binlog_unsafe.result:
  Updated results (RAND() doesn't require statement based logging anymore for inserts)
mysql-test/t/information_schema_all_engines.test:
  Ensure that InnoDB is used
storage/pbxt/bin/Makefile.am:
  Fixed build failure on build hosts
  (Patch from Kristian Nielsen)
storage/pbxt/bin/xtstat_xt.cc:
  Added missing argument
storage/pbxt/src/datalog_xt.cc:
  Fixed compiler warnings
storage/pbxt/src/ha_pbxt.cc:
  Fixed compiler warnings
storage/pbxt/src/table_xt.cc:
  Fixed compiler warnings
support-files/compiler_warnings.supp:
  Added suppression of compiler warnings in Xtradb
  (Failure can only happen for corrupted tables, but should be fixed properly at some point)

- INSERT with RAND() doesn't require row based logging again
- Some bugs fixed in opt_range() where we table->key_read was wrongly used



.bzrignore:
  Ignore new xtstat binary
mysql-test/r/index_merge_myisam.result:
  Update results (old result was wrong)
mysql-test/suite/binlog/r/binlog_stm_binlog.result:
  Added drop table first
mysql-test/suite/binlog/r/binlog_stm_unsafe_warning.result:
  Added test for when RAND() requires row based logging
mysql-test/suite/binlog/t/binlog_stm_binlog.test:
  Added drop table first
mysql-test/suite/binlog/t/binlog_stm_unsafe_warning.test:
  Added test for when RAND() requires row based logging
scripts/make_binary_distribution.sh:
  Removed type from last commit
sql/item_create.cc:
  Don't require row based logging when using RAND() with INSERT
sql/opt_range.cc:
  Revert wrong patch from Oracle:
  - As QUICK_RANGE_SELECT uses it's own 'file' handler to the tables, one can't use 'table->key_read' as a flag to detect if index only read (keyread) is used or not
  - Don't set keyread if keyread is already enabled
  - Don't disable key read, if we didn't enable it ourselves
  - Simplify code (and ensure that we do proper cleanup of index only read)
sql/opt_range.h:
  Added flags to detect if the range optimizer enabled index only read (key read) or not
sql/opt_sum.cc:
  Use our more optimized macros
sql/sql_lex.h:
  Added 'readable' function to check if we are in a sub query function or not (not normal query or sub query in FROM clause)
sql/sql_select.cc:
  Use our more optimized keyread macros
  Added ASSERTS early
  Simplify code on eliminate_item_equal()
  Fixed that substitute_for_best_equal_field() doesn't core dump in case of out of memory conditions.
  Removed not needed test for 'field->maybe_null()'
  Replaced master_unit()->item with is_subquery_function() (More readable)
sql/sql_update.cc:
  Use our more optimized keyread macros
sql/table.cc:
  Use our more optimized keyread macros
sql/table.h:
  Use separate functions to enable/disable Index only reads
  - Safer, more readable, better logging and faster.

replication thread or when opening a table

scripts/make_binary_distribution.sh:
  Added copying of xstat
scripts/make_win_bin_dist:
  Added copying of xstat

Result file update for main.subselect (the MySQL 5.1.46 version has buggy output in the .result, see BUG#47904 comments).

to work when a table is partitioned