[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/zonedump.h

@@ -35,7 +35,7 @@ spawn2 mediumblob, npcs mediumblob, npc_loot mediumblob, gmspawntype mediumblob,
 struct NPCType
 {
 	char	name[64];
-	char	lastname[70];
+	char	lastname[64];
 	int64	current_hp;
 	int64	max_hp;
 	float	size;