HEADSUP: routing table locking changes committed

I just committed a large set of changes to lock routing table entries.  I've 
been running with these changes for several months w/o ill effects but as 
always beware.  You will see some LOR's that I expect will go away with 
forthcoming work from Andre Oppermann.  If not they'll get fixed before the 
5.2 release.  The most likely one you'll see is when ejecting a network card 
from a laptop.

Please contact me directly if you see any problems that look related to these 
changes.

	Sam