Changes to TunnelIt between r4 and r5

''Ethernet tunnels with a netcat-like tool''

How to use it:
   * Host A (listener):
   ** `host-A# tunnelit-p2p -l`
   ** `host-A# ifconfig tap0 10.72.51.1 netmask 255.255.255.0 broadcast 10.72.51.255`
   * Host B (connector):
   ** `host-B# tunnelit-p2p -H host-A`
   ** `host-B# ifconfig tap0 10.72.51.2 netmask 255.255.255.0 broadcast 10.72.51.255`

Other options:
Usage: tunnelit-p2p [-VFhluo] [-p port] [-H host] [-d devname] [-f tunpath]
   -V            Print version and exit
   -F            Run in foreground (default is to background)
   -h            Print this help and exit
   -l            Listen (default is connect)
   -u            UDP mode
   -o            Only allow one client to connect at a time.
   -H <host>     Connect to host, required if "-l" not specified
   -d <devname>  TUN/TAP device name
   -f <tunpath>  Path to kernel TUN interface (default: /dev/net/tun)

Download:
    * http://www.rkeene.org/devel/tunnelit-0.0.0.1493.tar.gz -->     * http://www.rkeene.org/devel/tunnelit-0.0.0.1495.tar.gz

Legend

     Only in r4
     Only in r5
     -->      Modified slightly between r4 and r5