Peter Dunkley writes:
3) Use a hash-table to store $ruid, $tU, and $td
indexed on $si:$sp
4) Then when event_route[websocket:closed] is called you can retrieve the
information from the hash table and call unregister(). Use the $tU and
$td you have cached to construct the unregister() URI parameter.
why does unregister need $tU and $td params, because $ruid alone
uniquely identifies the contact to be unregistered?
-- juha