* Transport:

      - Cleanup max connections code
      - Add i2np.udp.maxConnections
      - Set max connections based on share bandwidth
      - Add haveCapacity() that can be used for connection
        throttling in the router
      - Reject IBGW/OBEP requests when near connection limit
      - Reduce idle timeout when near connection limit
    * Tunnel request handler:
      - Require tunnel.dropLoad* stats
      - Speed up request loop