Changes to TunnelIt between r9 and r10

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

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
   -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 -->    -d <devname>  TUN/TAP device name (i.e., "tap0")
   -f <tunpath>  Path to kernel TUN interface (default: /dev/net/tun)
(blank line)
   -f <tunpath>  Path to kernel TUN interface (i.e., "/dev/net/tun")
(blank line)
'''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.

Download:
    * http://www.rkeene.org/devel/tunnelit-0.0.1.1497.tar.gz

Legend

     Only in r9
     Only in r10
     -->      Modified slightly between r9 and r10