void exit(object ob)
This function was used in compat mode drivers in context
with moving objects. Nowadays objects are moved by means
of the H_MOVE_OBJECT0/1 hooks, and use of this lfun is
up to the mudlib.
This function was called in the old environment everytime a
living object ob leaves it.
The function this_player() will return a random value, don't
use it at this point.
WARNING: Using this function is EXTREMELY dangerous. A single
bug, and you are forever (i.e. until the next reboot occurs)
caught in the room.