Southern Cross POI adjustment and Map adjustments

- DJ Station APC turned off at default
- DJ Station one general intercom replaced with a syndicate intercom
- DJ Station headset no longer guaranteed to spawn, one in four chance to spawn in one of the rooms
- DJ Station Exterior tiles (around the generator) marked as outdoor tiles
- Advanced roller beds moved to SAR lockers
- Blood cabinet and IV stand in SAR room, two o- blood bags and two empty blood bags at round start
- Mining outpost now locked to IDs with maintenance access and research access
- Observation windows in xenobio are now electrified
- Extra sinks and a high capacity water tank added to xenobio
- Red flags in the caves to designate the 'border' between the regular caves and the more dangerous ones
- Xenoresearch first aid station door name fixed

code/game/objects/items/devices/radio/headset.dm

@@ -180,6 +180,13 @@
 	item_state = "headset"
 	ks2type = /obj/item/device/encryptionkey/heads/captain
 
+/obj/item/device/radio/headset/heads/captain/sfr
+	name = "SFR headset"
+	desc = "A headset belonging to a Sif Free Radio DJ. SFR, best tunes in the wilderness."
+	icon_state = "com_headset_alt"
+	item_state = "headset"
+	ks2type = /obj/item/device/encryptionkey/heads/captain
+
 /obj/item/device/radio/headset/heads/ai_integrated //No need to care about icons, it should be hidden inside the AI anyway.
 	name = "\improper AI subspace transceiver"
 	desc = "Integrated AI radio transceiver."