map unloading is now a whole lot better

src/server.h

@@ -534,6 +534,7 @@ class Server : public con::PeerHandler, public MapEventReceiver,
 	float m_objectdata_timer;
 	float m_emergethread_trigger_timer;
 	float m_savemap_timer;
+	IntervalLimiter m_map_timer_and_unload_interval;
 	
 	// NOTE: If connection and environment are both to be locked,
 	// environment shall be locked first.