Changes to TunnelIt between r12 and r13

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

'''Security Note:''' No authentication of any type is performed, it is assumed that you take care of this at lower layers (firewall, physical access, etc).  This tool is intentionally simple.

How to use it:
   * Host A (listener):
   ** `hostA# tunnelit-p2p -l`
   ** `hostA# ifconfig tap0 10.72.51.1 netmask 255.255.255.0 broadcast 10.72.51.255`
   * Host B (connector):
   ** `hostB# tunnelit-p2p -H hostA`
   ** `hostB# 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 (implies "-o")
   -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 (i.e., "tap0")
   -f <tunpath>  Path to kernel TUN interface (i.e., "/dev/net/tun")
----
Download:
    * http://www.rkeene.org/devel/tunnelit-0.0.1.1497.tar.gz -->     * http://www.rkeene.org/devel/tunnelit-0.0.1.1510.tar.gz
----
Screenshots:

[http://www.rkeene.org/projects/info/resources/projects/tunnelit/tunnelit-p2p-1.png]

Legend

     Only in r12
     Only in r13
     -->      Modified slightly between r12 and r13