- current_arena to stmt_arena: the thread may have more than one
'current' arenas: one for runtime data, and one for the parsed 
tree of a statement. Only one of them is active at any moment.
- set_item_arena -> set_query_arena, because Item_arena was renamed to 
Query_arena a while ago
- set_n_backup_item_arena -> set_n_backup_active_arena;
the active arena is the arena thd->mem_root and thd->free_list
are currently pointing at.
- restore_backup_item_arena -> restore_active_arena (with the same
rationale)
- change_arena_if_needed -> activate_stmt_arena_if_needed; this
method sets thd->stmt_arena active if it's not done yet.

into  eel.(none):/home/jonas/src/mysql-5.0-push

into  eel.(none):/home/jonas/src/mysql-5.0-push

into  eel.(none):/home/jonas/src/mysql-5.0-push

into  eel.(none):/home/jonas/src/mysql-5.0

into  mysql.com:/users/lthalmann/bk/mysql-5.0

  Always abort if node failure occured between startTransaction and commit
  (can later be improved by wl#2610)

  make sure not to cut log to early 
  (specificly not use LCP with maxGciStarted that has not yet completed)

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0

into  mysql.com:/users/lthalmann/bk/mysql-5.0

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0

into  mysql.com:/usr/home/bar/mysql-5.0

  Fix crash reported in bug 12849.
  It doesn't fix the whole problem though.
  Let Pem fix it later.

into  mysql.com:/users/lthalmann/bk/mysql-4.1-bug12542

into  mysql.com:/home/dlenev/src/mysql-5.0-merges

and GRANT in multi-threaded environment" into 5.0 tree.

into  mysql.com:/home/dlenev/src/mysql-5.0-merges

into  neptunus.(none):/home/msvensson/mysql/mysql-4.1

into  mysql.com:/users/lthalmann/bk/mysql-4.1-bug12542

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0

into  neptunus.(none):/home/msvensson/mysql/bug11316/my41-bug11316

into  neptunus.(none):/home/msvensson/mysql/bug11316/my50-bug11316

into  mysql.com:/home/dlenev/src/mysql-4.1-bg12423

multi-threaded environment".

To avoid deadlocks between several simultaneously run account management 
commands (particularly between FLUSH PRIVILEGES/SET PASSWORD and GRANT
commands) we should always take table and internal locks during their
execution in the same order. In other words we should first open and lock
privilege tables and only then obtain acl_cache::lock/LOCK_grant locks.

into  neptunus.(none):/home/msvensson/mysql/mysql-5.0

into  neptunus.(none):/home/msvensson/mysql/bug11286/my50-bug11286

into mysql.com:/Users/kent/mysql/bk/mysql-4.1

  Make sure mtr_kill_processes() is called with an array ref
  Corrected error string for STDERR redirect