Some of you may say this is pointless, but some people may find useful this is clustering support written by megai2, Dron01, ZzZzZzZ, Ranger, Kikaxa and grawn.
Here is Part 1: world server diffs changes: various spellfixes(restro shaman, mage(all specs working perfect!), warlock, priest, warrior, paladin), some clustering code, exploit fixes, anti speedhack redone.
Part 1
Here is Part 2: realmserver changeset.
Part 2