2005-10-25 jrandom

    * Defer netDb searches for newly referenced peers until we actually want
      them
    * Ignore netDb references to peers on our shitlist
    * Set the timeout for end to end client messages to the max delay after
      finding the leaseSet, so we don't have as many expired messages floating
      around.
    * Add a floor to the streaming lib window size
    * When we need to send a streaming lib ACK, try to retransmit one of the
      unacked packets instead (with updated ACK/NACK fields, of course).  The
      bandwidth cost of an unnecessary retransmission should be minor as
      compared to both an ACK packet (rounded up to 1KB in the tunnels) and
      the probability of a necessary retransmission.
    * Adjust the streaming lib cwin algorithm to allow growth after a full
      cwin messages if the rtt is trending downwards.  If it is not, use the
      existing algorithm.
    * Increased the maximum rto size in the streaming lib.
    * Load balancing bugfix on end to end messages to distribute across
      tunnels more evenly.