Hard upstream sync (#6951)

* maps - none of our changes included yet i'll get them in after i finish up the rest of the sync

* sync part 1 - underscore folders in code

* controllers folder

* datums folder

* game folder

* cmon, work

* modules - admin to awaymissions

* cargo to events

* fields to lighting

* mapping > ruins

* rest of the code folder

* rest of the folders in the root directory

* DME

* fixes compiling errors. it compiles so it works

* readds map changes

* fixes dogborg module select

* fixes typo in moduleselect_alternate_icon filepath

code/modules/events/vent_clog.dm

@@ -24,7 +24,8 @@
 /datum/round_event/vent_clog/setup()
 	endWhen = rand(25, 100)
 	for(var/obj/machinery/atmospherics/components/unary/vent_scrubber/temp_vent in GLOB.machines)
-		if(is_station_level(temp_vent.loc.z) && !temp_vent.welded)
+		var/turf/T = get_turf(temp_vent)
+		if(T && is_station_level(T.z) && !temp_vent.welded)
 			vents += temp_vent
 	if(!vents.len)
 		return kill()