Fix based on suggestion by Zardosht Kasheff and Richard Prohaska) for making all clustered indexes equal in test_if_skip_sort_order()


sql/sql_select.cc:
  - Threat all clustered indexes equal in test_if_skip_sort_order().
    This is a temporary fix as the current code doesn't do proper cost analyizes for which index to use.
    I will address this later as the change required is not trivial.
  - Fixed a bug where select_limit was changed in the loop, which made different indexes see diferent values of select_limit

- Added a lot of code comments
- Updated get_best_ror_intersec() to prefer index scan on not clustered keys before clustered keys.
- Use HA_CLUSTERED_INDEX to define if one should use HA_MRR_INDEX_ONLY
- For test of using index or filesort to resolve ORDER BY, use HA_CLUSTERED_INDEX flag instead of primary_key_is_clustered()
- Use HA_TABLE_SCAN_ON_INDEX instead of primary_key_is_clustered() to decide if ALTER TABLE ... ORDER BY will have any effect.

sql/ha_partition.h:
  Added comment with warning for code unsafe to use with multiple storage engines at the same time
sql/handler.h:
  Added HA_CLUSTERED_INDEX.
  Documented primary_key_is_clustered()
sql/opt_range.cc:
  Added code comments
  Updated get_best_ror_intersec() to ignore clustered keys.
  Optimized away cpk_scan_used and one instance of current_thd (Simpler code)
  Use HA_CLUSTERED_INDEX to define if one should use HA_MRR_INDEX_ONLY
sql/sql_select.cc:
  Changed comment to #ifdef
  For test of using index or filesort to resolve ORDER BY, use HA_CLUSTERED_INDEX flag instead of primary_key_is_clustered()
  (Change is smaller than what it looks beause of indentation change)
sql/sql_table.cc:
  Use HA_TABLE_SCAN_ON_INDEX instead of primary_key_is_clustered() to decide if ALTER TABLE ... ORDER BY will have any effect.
storage/innobase/handler/ha_innodb.h:
  Added support for HA_CLUSTERED_INDEX
storage/innodb_plugin/handler/ha_innodb.cc:
  Added support for HA_CLUSTERED_INDEX
storage/xtradb/handler/ha_innodb.cc:
  Added support for HA_CLUSTERED_INDEX

Original code by Zardosht Kasheff

sql/handler.cc:
  Added HA_ERR_DISK_FULL and ENOSPC (for handler that uses normal errno).
  This sets 'fatal_error' to ensure that the error is logged to err file (which hopefully is on another disk...)

Fixed alias bug when compiling with gcc 4.2.4 that caused subselect.test to fail

sql/item.cc:
  Removed alias warnings by changing type from char * to const char*
sql/item.h:
  Removed alias warnings by changing type from char * to const char*
sql/item_subselect.cc:
  Fixed alias bug when compiling with gcc 4.2.4 that caused subselect.test to fail
sql/sql_string.h:
  Removed alias warnings by changing type from char * to const char*
storage/heap/hp_test2.c:
  Removed SAFEMALLOC to get rid of compiler error
  Fixed test case as we can't anymore use heap_rlast() on a HASH key entry.

(from Wlad)

storage/maria/ma_loghandler.c:
  Awoiding signed and unsigned comporison.
storage/maria/ma_loghandler.h:
  debug function.
storage/maria/unittest/ma_loghandler_examples.c:
  debug function.

storage/maria/ma_loghandler.c:
  Added assert if we give wrong type to translog_write_record().
  (This should be impossible, but the failure record in buildbot also looks impossible so we need more information...)
storage/maria/ma_loghandler.h:
  Added prototype for check_translog_description_table()
storage/maria/unittest/ma_loghandler_examples.c:
  Call check_translog_description_table() to register number of log_record_type_descriptor[] events.

- add version info for the client library, dynamic plugins and some utilities
- do not recompile client library sources 3 times (for mysqlclient , mysqlclient_notls and libmysql)
  One time is sufficient, so get rid of mysqlclient_notls, and link  static client library  to  the shared.
- remove incremental linking flag

 my_rwlock_destroy=>rwlock_destroy

- Fix  active lock in freed memory in ha_archive (share mutex was not released prior to free())
- Do not attempt vio_fastsend or vio_keepalive on named pipes and shared memory.

LPBUG#782223 : Memory released by Query_cache::resize() or Query_cache::free() contains active rwlocks.
The bug was found by application verifier. 
Fixed by destroying locks prior to free(),

LPBUG#782269 : critical sections are initialized twice in   xt_xn_init_db() 
LPBUG#782431: active lock in memory released by   xt_ind_exit()
LPBUG#782433 : xt_heap_release() does not release spinlock  hp->h_lock initialized in xt_heap_new().
LPBUG#782435: xt_exit_row_locks() tries to release unallocated locks

mysql-test/mysql-test-run.pl:
  Directories added for mac to lybrary search paths.
plugin/handler_socket/libhsclient/Makefile.am:
  Static build of library removed.

Made test-unit run in parlallel. This was achived by having all aria tests that uses temporary files to create the temporary file in an unique tempdirectory.
aria_chk now returns 1 if one got any warnings during check and 2 if one got errors.
lp:728919 maria_chk should fail on all detected corruptions

mysql-test/lib/My/SafeProcess.pm:
  Removed ^M lines from the file
storage/maria/ma_check.c:
  Fixed indentation
storage/maria/maria_chk.c:
  aria_chk now returns 1 if one got any warnings during check and 2 if one got errors.
storage/maria/unittest/ma_control_file-t.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_maria_log_cleanup.c:
  Added help function create_tmpdir()
storage/maria/unittest/ma_pagecache_consist.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_pagecache_rwconsist.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_pagecache_rwconsist2.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_pagecache_single.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_test_all-t:
  Use unique sub directory for test results
storage/maria/unittest/ma_test_loghandler-t.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_test_loghandler_first_lsn-t.c:
  Use unique sub directory for test results
  remove delete of files that are already deleted by maria_log_remove()
storage/maria/unittest/ma_test_loghandler_max_lsn-t.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_test_loghandler_multigroup-t.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_test_loghandler_multithread-t.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_test_loghandler_noflush-t.c:
  Use unique sub directory for test results
  remove delete of files that are already deleted by maria_log_remove()
storage/maria/unittest/ma_test_loghandler_nologs-t.c:
  Use unique sub directory for test results
storage/maria/unittest/ma_test_loghandler_pagecache-t.c:
  Use unique sub directory for test results
  remove delete of files that are already deleted by maria_log_remove()
storage/maria/unittest/ma_test_loghandler_purge-t.c:
  Use unique sub directory for test results
support-files/compiler_warnings.supp:
  Supress some warnings
unittest/unit.pl:
  Run 4 unittests in parallel

Fix library build on mac (prevent handlersocket.so loading failure if it called from build directory)

Simplifies handling 5.1 in buildbot.

On Windows, do not attempt access() for special device names like
CON, PRN etc. access() would return 0, this does not mean that fiile
with this name exists.

Store decimal 0.0 in zero bytes in dynamic strings.
mysqltest: Don't ignore error from mysql_stmt_fetch;  This could cause rows to be missing from log when running with --ps-protocol
Fixed wrong result length for CAST(... as TIME)






client/mysqltest.cc:
  Don't ignore error from mysql_stmt_fetch;  This could cause rows to be missing from log when running with --ps-protocol
libmysql/libmysql.c:
  The max length for a TIME column is 17, not 15.
mysql-test/r/dyncol.result:
  More tests
mysql-test/t/dyncol.test:
  More tests
mysys/ma_dyncol.c:
  Check content of decimal value on read and store to not get assert in decimal_bin_size().
  Store decimal 0.0 in zero bytes in dynamic strings. This also solves a problem where decimal 0 had different internal representations.
sql-common/my_time.c:
  Fixed DBUG_PRINT
sql/item_timefunc.h:
  Fixed wrong result length for CAST(... as TIME). This was the cause of failures in buildbot when doing cast(... as time);
sql/protocol.cc:
  More DBUG_PRINT

sql/item_subselect.cc:
  Cleanup. Comments added.
sql/item_subselect.h:
  Cleanup.
sql/mysql_priv.h:
  Comments added.
sql/opt_subselect.cc:
  The function renamed and turned to method.
  Comments added.
sql/opt_subselect.h:
  The function turned to method of JOIN.
sql/sql_select.cc:
  Comment added. The function turned to method.
sql/sql_select.h:
  The function turned to method.

Fixed a memory overrun in dynamic columns when sending in a mailformed (too short in this case) string.

mysql-test/t/dyncol.test:
  Added test case for mailformed string usage
mysys/ma_dyncol.c:
  Added test for wrong dynamic string data

mysql-test/r/create.result:
  test of renaming
mysql-test/r/upgrade.result:
  Now such behaviour prohibited to avoid problems.
mysql-test/t/create.test:
  test of renaming
mysql-test/t/upgrade.test:
  Now such behaviour prohibited to avoid problems.
sql/mysql_priv.h:
  Function to test table name presence added.
sql/sql_rename.cc:
  Rename fixed.
sql/sql_table.cc:
  Function to test table name presence added.
  Create fixed.

mysql-test/r/dyncol.result:
  Updated test results
mysql-test/r/index_intersect.result:
  Updated results
mysql-test/r/index_intersect_innodb.result:
  Updated results
mysql-test/t/dyncol.test:
  Added replace_result for floating point results that are different on windows
  Added round() around a result to get same result on all platforms.
mysql-test/t/index_intersect.test:
  Added replace_result to fix that index_merge may put key names in different order.
mysys/ma_dyncol.c:
  Fixed compiler warnings on Solaris
sql/key.cc:
  Fixed compiler warnings on Solaris
sql/mysqld.cc:
  Fixed compiler warning on windows
support-files/compiler_warnings.supp:
  Suppressed an unintersting warning on Solaris

The problem was that connection con5, which is supposed to be the leader for
the third group, could if timing was bad end up as participant in the second
group, causing the test to fail.

Fixed by ensuring that group 2 is running before starting the transaction
for group 3.

Fix various warnings about conversion from bigger to smaller integer types in assignments

Bugs fixed:
- Added automatic detection of unsigned arguments to COLUMN_CREATE()
- If string length is not know for COLUMN_GET() use MAX_DYNAMIC_COLUMN_LENGTH instead of MAX_FIELD_BLOBLENGTH
- null_value flag was not propery reset for COLUMN_LIST() and COLUMN_CREATE() which could lead to crashes later:
- lp:778905 Assertion `value->year <= 9999' failed in dynamic_column_date_store
- lp:778912 Assertion `field_pos < field_count' failed in Protocol_text::store in maria-5.3-mwl34

include/ma_dyncol.h:
  Added define for max dynamic column length.
mysql-test/r/cast.result:
  Added test of cast big unsigned int to signed (this test case was missing)
mysql-test/r/dyncol.result:
  Added tests from reported bugs
  Added testing of automatic store of signed/unsigned integers
mysql-test/t/cast.test:
  Added test of cast big unsigned int to signed (this test case was missing)
mysql-test/t/dyncol.test:
  Added tests from reported bugs
  Added testing of automatic store of signed/unsigned integers
sql/item.cc:
  Added assert to catch cases where null_value is not set properly
sql/item_strfunc.cc:
  Added automatic detection of unsigned arguments to COLUMN_CREATE()
  COLUMN_GET() returned wrong value for illegal strings which lead to assert later
  null_value flag was not propery reset for COLUMN_LIST() and COLUMN_CREATE() which could lead to crashes later.
sql/item_strfunc.h:
  If string length is not know for COLUMN_GET() use MAX_DYNAMIC_COLUMN_LENGTH