Real query added. In fact this queary only need if your npc_trainer table have unfixed yet
outdated spell 64904. In other case it work in same way as old empty sql update version.
* Replace 64904 by 64901 in spellbook and action bars.
* Implement proper max mana percent buff
* Implement proper target selection.
* Move group/raid targets seelction code to functions for reuse code.
