Server state query works, client doesn't use the result yet

Both sides of this message uses QUERY_CHARACTER_EXISTS because I'm just
trying to push forward, without worrying about mistakes I might be making.
I just want to merge this back into the main branch so I can say that I've
actually done something over the last few months.

server/server_application.hpp

@@ -93,6 +93,8 @@ private:
 
 	//data management
 	void HandleRegionRequest(RegionPacket* const);
+	void HandleCharacterExists(CharacterPacket* const);
+
 	void SaveServerState();
 
 	//character management