xpans [-h] [-e] [-k sec] [-p port] [-l log] [-s security log] [-P n]

  -h            print help message
  -e            exit when there are no more XPA connections
  -k            send keepalive messages every n sec
  -l            log data base entries to specified file
  -p            listen for connections on specified port
  -s            log security info for each connection to specified file
  -P            accept proxy requests (P=1) using separate thread (P=2)