kern/130059: [panic] Leaking 50k mbufs/hour

[Jason DiCioccio]

I narrowed this bug down to the following patch to djb's ucspi-tcp
(adds ipv6 functionality):
http://www.fefe.de/ucspi/

I don't think that userland processes should be able to wreak that
much havoc on the network stack.  Another thing of note is that even
if I kill the processes causing the problem, the mbufs are never
reclaimed.  Seems like a permanent leak.

When I got rid of the ipv6 patch, the mbufs stopped building up and
everything has been fine..  Note that the ipv6 traffic for this
process was fairly minimal.