2005-09-12 jrandom

    * Removed guaranteed delivery mode entirely (so existing i2phex clients
      using it can get the benefits of mode=best_effort).  Guaranteed delivery
      is offered at the streaming lib level.
    * Improve the peer selection code for peer testing, as everyone now
      supports tests.
    * Give the watchdog its fangs - if it detects obscene job lag or if
      clients have been unable to get a leaseSet for more than 5 minutes,
      restart the router.  This was disabled a year ago due to spurious
      restarts, and can be disabled by "watchdog.haltOnHang=false", but the
      cause of the spurious restarts should be gone.