[Rules] Add Rule to Disable NPC Last Names. (#2227)

* [Rules] Add Rule to Disable NPC Last Names.
- Add NPC:DisableLastNames to disable NPC Last Names.
- Fix #npcedit lastname to allow you to use an empty string.

* Cleanup of classes in naming.

* Duplicate.

* Update classes.cpp

zone/mob.h

@@ -737,6 +737,7 @@ public:
 	void CreateHPPacket(EQApplicationPacket* app);
 	void SendHPUpdate(bool force_update_all = false);
 	virtual void ResetHPUpdateTimer() {}; // does nothing
+	static void SetSpawnLastNameByClass(NewSpawn_Struct* ns);
 
 	//Util
 	static uint32 RandomTimer(int min, int max);