pf killing NFS

[Pete French]

> I pulled the "scrub in all" line and replaced it with a "scrub in on 
> bge0".  I don't really care about scrubbing on the internal network.  All 
> works as expected now.

I dont really care about scrubbing my intrenal nbetwork either - but I do care
about NAT working on the outside, which requires fragment reassembly before
the packets go out  - hence I scrub to reassemble any fragmented packets
comming into the machine. I dont know if this is actually necessary or not,
but I thought it best to be on the safe side!

-pete.