Moved a lot of old bug fixes and safe cleanups from Maria 5.1 tree to 5.1

- Reserver namespace and place in frm for TABLE_CHECKSUM and PAGE_CHECKSUM create options
- Added syncing of directory when creating .frm files
- Portability fixes
- Added missing cast that could cause bugs
- Code cleanups
- Made some bit functions inline
- Moved things out of myisam.h to my_handler.h to make them more accessable
- Renamed some myisam variables and defines to make them more globaly usable (as they are used outside of MyISAM)
- Fixed bugs in error conditions
- Use compiler time asserts instead of run time
- Fixed indentation
HA_EXTRA_PREPARE_FOR_DELETE -> HA_EXTRA_PREPARE_FOR_DROP as the old name was wrong
(Added a define for old value to ensure we don't break any old code)
Added HA_EXTRA_PREPARE_FOR_RENAME as a signal for rename (before we used a DROP signal which is wrong)
- Initialize error messages early to get better errors when mysqld or an engine fails to start
- Fix windows bug that query_performance_frequency was not initialized if registry code failed
- thread_stack -> my_thread_stack_size

sql/sql_test.cc

@@ -459,7 +459,7 @@ void mysql_print_status()
   VOID(my_getwd(current_dir, sizeof(current_dir),MYF(0)));
   printf("Current dir: %s\n", current_dir);
   printf("Running threads: %d  Stack size: %ld\n", thread_count,
-	 (long) thread_stack);
+	 (long) my_thread_stack_size);
   thr_print_locks();				// Write some debug info
 #ifndef DBUG_OFF
   print_cached_tables();
@@ -536,7 +536,7 @@ Estimated memory (with thread stack):    %ld\n",
 	 (int) info.uordblks,
 	 (int) info.fordblks,
 	 (int) info.keepcost,
-	 (long) (thread_count * thread_stack + info.hblkhd + info.arena));
+	 (long) (thread_count * my_thread_stack_size + info.hblkhd + info.arena));
 #endif
 
   Events::dump_internal_status();