There's another bug in the tun driver which I mean to fix some day
(though I haven't yet looked at the code -- it's probably trivial to
fix..)

Reads on the `tun' device are non-interruptable.. if you have
something blocked in a read on tun0, in order to kill it, you need to:

	a) send it a signal
	b) cause a packet to exit the interface.

.. when just sending the signal should be sufficient.. This is a real
misfeature.

I would welcome it if someone else beat me to fixing this.. :-)

					- Bill