Usage: ON [#|+|-|^|&|@]EXIT [-|^]<paramters> [action]
  This is activated whenever the client is about to exit.  The client
  cannot be stopped from exiting once this ON has been hooked.  It is
  provided for a useful way to do any graceful cleanup your session 
  might want to do before you exit.  The client exits immediately after
  this ON is executed.

    $0  The string "Exiting"
