@SET ( (sticky-exit) | (group) ) = TATTLE
Setting a Group T (tattle) will tell the owner of the group
whenever anyone/anything enters or leaves the group, providing the
owner is online.
Setting a Sticky Exit T (tattle) will cause the sticky exit to
notify the owner when it is used, much like Tattle Groups.
At a future time, tattle will work on non-sticky exits.
Tattle on rooms means TEMPLE, and requires special permissions