Adjust AI Aggro check timers for NPC's with npc_aggro flag set to be far less excessive (Performance increase)

common/features.h

@@ -154,7 +154,7 @@ enum {	//reuse times
 enum {	//timer settings, all in milliseconds
 	AImovement_duration = 100,
 	AIthink_duration = 150,
-	AIscanarea_delay = 500,
+	AIscanarea_delay = 6000,
 	AIfeignremember_delay = 500,
 	AItarget_check_duration = 500,
 	AIClientScanarea_delay = 750,	//used in REVERSE_AGGRO