mob ai: iff factions, small turbolift/maploader fix (#6702)

replaces old faction system with one that supports lists

code/game/objects/structures/ashlander.dm

@@ -397,10 +397,10 @@
 
 /obj/structure/ashlander/statue/proc/Bless(mob/user)
 	var/mob/living/carbon/human/H = usr
-	if(!H.faction == "lavaland")
-		to_chat(user, "<span class='danger'>You feel as if an eye briefly regards you, and then turns away.</span>")
-	else
-		H.add_modifier(/datum/modifier/ashlander_blessing, 15 MINUTES)
+	// if(!H.faction == "lavaland")
+	//		to_chat(user, "<span class='danger'>You feel as if an eye briefly regards you, and then turns away.</span>")
+	// else
+	H.add_modifier(/datum/modifier/ashlander_blessing, 15 MINUTES)
 
 /datum/modifier/ashlander_blessing
 	name = "The Mother's Blessing"

code/game/objects/structures/props/nest.dm

@@ -53,7 +53,7 @@
 		var/spawn_choice = pick(creature_types)
 		var/mob/living/L = new spawn_choice(spawnpoint)
 		if(den_faction)
-			L.faction = den_faction
+			L.set_iff_factions(den_faction)
 		visible_message("<span class='warning'>\The [L] crawls out of \the [src].</span>")
 		den_mobs += L
 		tally++

code/game/objects/structures/props/swarm.dm

@@ -14,12 +14,14 @@
 /obj/structure/cult/pylon/swarm/CanAllowThrough(atom/movable/mover, turf/target)
 	if(istype(mover, /mob/living))
 		var/mob/living/L = mover
-		if(L.faction == "swarmer")
+		if(L.has_iff_faction(MOB_IFF_FACTION_SWARMER))
 			return TRUE
 	else if(istype(mover, /obj/projectile))
 		var/obj/projectile/P = mover
-		if(istype(P.firer) && P.firer.faction == "swarmer")
-			return TRUE
+		if(isliving(P.firer))
+			var/mob/living/L = P.firer
+			if(L.has_iff_faction(MOB_IFF_FACTION_SWARMER))
+				return TRUE
 	return ..()
 
 /obj/structure/cult/pylon/swarm/Initialize(mapload)