silly differences between the NetBSD copy of the code and the
vendor branch, keeping only those which are necessary. Of those
differences that currently exist, several "portability to NetBSD"
issues, which will be fed back to the ipfilter author.
XXX !!! XXX !!!
I noticed a few semi-serious bugs while doing this merge, one of which
has existed for a fairly long time. Some of them are addressed in this
commit (because they caused the kernel to not compile), and are annoted
by "XXX" and "--thorpej". The other one will be addressed shortly in
a future commit, and, as far as I can tell, affects all operating systems
which IP Filter supports.
