New ISO available / network stability

[Pete Carah]

I just recompiled my suspect systems today; as of last night with a compile
from early wednesday, the leaks were still present.

I suspect arp in the one box that was still crashing this morning (it is
the one that gets 25k/hr of extraneous arp requests); if you fixed that 
then we're probably home free.  I'm watching the total in vmstat and
it seems to be growing about 10kb/hr still.  Don't know what that means
or if it will sustain; the system has only been up about 3hr since
building and rebooting.

That box also sees a fair number of spanning-tree packets and some CDP;
if the unknown-protocol packets get dropped wrong we could have another
source of leaks...  The only probably source of mbuf leaks in that path
is probably the first one you addressed in netisr.  Don't know about lwkt
leaks...

-- Pete