Aghosted mobs no longer act as SSD

Removed player_logged var since it didn't serve it's intended purpose and replaced with aghosted var. Changed SSD checks to only look at client since regardless of what key gets set to I think we probably don't want players being told a mob is SSD if there is some client controlling it.

code/modules/mob/dead/observer/observer.dm

@@ -216,6 +216,7 @@ This is the proc mobs get to turn into a ghost. Forked from ghostize due to comp
 			return
 	mind.current.ajourn=0
 	mind.current.key = key
+	mind.current.aghosted = null
 	if(!admin_ghosted)
 		announce_ghost_joinleave(mind, 0, "They now occupy their body again.")
 	return 1