Fixed memory leak in DROP DATABASE when using RAID tables (Bug #2882)

BUILD/compile-pentium-debug-max:
  Added --with-raid
configure.in:
  Removed -DFN_NO_CASE_SENCE for Mac OS X as this is not always true
mysql-test/install_test_db.sh:
  Added --skip-warnings
mysql-test/mysql-test-run.sh:
  Fixes to get --gdb and --ddd to work
mysql-test/r/lowercase_table2.result:
  Test for lower_case_table_names=2 and temporary tables
mysql-test/r/lowercase_table3.result:
  Fixed error message
mysql-test/r/multi_update.result:
  Test of behaviour of multi-table-delete and alias
mysql-test/t/lowercase_table2.test:
  Test for lower_case_table_names=2 and temporary tables
mysql-test/t/lowercase_table3.test:
  Fixed error
mysql-test/t/multi_update.test:
  Test of behaviour of multi-table-delete and alias (Bug #2940)
mysys/mf_iocache.c:
  Renamed _flush_io_cache to my_b_flush_io_cache
sql/ha_myisam.cc:
  Added comment
sql/lock.cc:
  Extra debugging
sql/log.cc:
  New parameter to flush_relay_log_info
sql/log_event.cc:
  New parameter to flush_relay_log_info
sql/mf_iocache.cc:
  Removed not used header files
sql/mysqld.cc:
  More debugging info
  Less warnings when run with --skip-warnings
sql/opt_range.cc:
  More debug information
sql/repl_failsafe.cc:
  New parameter to flush_relay_log_info
sql/slave.cc:
  First start SQL thread, then start IO thread. This fixed a raze condition in SLAVE START (Bug #2921)
  Ensure that we have a lock on the IO thread before flushing a relay log file that. The original code could core dump when a relay log rotated.
sql/slave.h:
  New parameter to flush_relay_log_info
sql/sql_base.cc:
  Added warning
sql/sql_handler.cc:
  Indentation fix
sql/sql_repl.cc:
  New parameter to flush_relay_log_info
sql/sql_select.cc:
  Fixed problem with deleting temporary tables when using lower_case_table_names=2. (Bug #2858)
sql/sql_table.cc:
  Fixed comment
sql/sql_yacc.yy:
  Removed compiler warning
include/my_sys.h:
  Fixed usage of unpack_filename
mysys/mf_pack.c:
  Changed unpack_filename() to return length of result string.
mysys/test_fn.c:
  Fixed usage of unpack_filename
sql/sql_db.cc:
  Fixed memory leak with raid tables
sql/table.cc:
  Fixed usage of unpack_filename

mysys/mf_pack.c

@@ -347,11 +347,25 @@ static my_string NEAR_F expand_tilde(my_string *path)
   return (my_string) 0;
 }
 
-	/* fix filename so it can be used by open, create .. */
-	/* to may be == from */
-	/* Returns to */
 
-my_string unpack_filename(my_string to, const char *from)
+/*
+  Fix filename so it can be used by open, create
+
+  SYNOPSIS
+    unpack_filename()
+    to		Store result here. Must be at least of size FN_REFLEN.
+    from	Filename in unix format (with ~)
+
+  RETURN
+    # length of to
+
+  NOTES
+    to may be == from
+    ~ will only be expanded if total length < FN_REFLEN
+*/
+
+
+uint unpack_filename(my_string to, const char *from)
 {
   uint length,n_length;
   char buff[FN_REFLEN];
@@ -362,17 +376,17 @@ my_string unpack_filename(my_string to, const char *from)
   if (n_length+strlen(from+length) < FN_REFLEN)
   {
     (void) strmov(buff+n_length,from+length);
-    (void) system_filename(to,buff);		/* Fix to usably filename */
+    length= system_filename(to,buff);		/* Fix to usably filename */
   }
   else
-    (void) system_filename(to,from);		/* Fix to usably filename */
-  DBUG_RETURN(to);
+    length= system_filename(to,from);		/* Fix to usably filename */
+  DBUG_RETURN(length);
 } /* unpack_filename */
 
 
 	/* Convert filename (unix standard) to system standard */
 	/* Used before system command's like open(), create() .. */
-	/* Returns to */
+	/* Returns length of to */
 
 uint system_filename(my_string to, const char *from)
 {