That's actually the CID of the map in gs.conf
if a map is set up as PvP enabled there will be no 'death dialog' you will automatically 'res' without being presented with the normal options like "go to town" "res using scroll" or "res (from cleric)"...
All the 'default' settings for the arena are actually set that same way, and battlegrounds (for TW) are set almost the same (different CID with a slightly different side effect) where you automatically 'res' after death and are sealed for 30 seconds...
That's all controlled in GS.CONF / CID variable:
http://forum.ragezone.com/f695/gs-co...1/#post5640055
NOTE: also remember there is NO death penalty (EXP loss/item drop/etc...) when an instance is PvP enabled (which would be my guess as to why there is also no choice of how you 'res' like there normally is), so if you change it, there WILL be a death penalty :wink: