Update to 0.24
    
    - New upstream release 0.24
      - Added support for changing I/O activity timeouts, so that custom
        retransmission policies can be implemented
      - Added ACCESS_CHALLENGE packet type definition
      - Fix the excessive wait on processing broadcasts when at least one of the
        nodes in node list did not listen on the requested port (a side-effect is
        that it is now possible to set timeout in floating seconds since the epoch)
    - BR: perl(Time::HiRes)