2004-11-29 jrandom

    * Reduced contention for local client delivery
    * Drop the new code that munges the wrapper.config.  Instead, updates that
      need to change it will include their own wrapper.config in the
      i2pupdate.zip, overwriting the existing file.  If the file
      "wrapper.config.updated" is included, it is deleted at first opportunity
      and the router shut down, displaying a notice that the router must be
      started again cleanly to allow the changes to the wrapper.config to take
      effect.
    * Properly stop accept()ing I2PSocket connections if we close down the
      session (duh).
    * Make sure we cancel any outstanding Packets in flight when a connection
      is terminated (thanks susi!)
    * Split up the I2PTunnel closing a little further.