fix my previously bogus MAKEDEVs.
If you used pf on a non-i386. the major device number has changed,
and you'll need to recreate /dev/pf
ok theo

licence in a way that makes ipf not free according to the rules we
established over 5 years ago, at www.openbsd.org/goals.html (and those
same basic rules govern the other *BSD projects too).  Specifically,
Darren says that modified versions are not permitted.  But software
which OpenBSD uses and redistributes must be free to all (be they
people or companies), for any purpose they wish to use it, including
modification, use, peeing on, or even integration into baby mulching
machines or atomic bombs to be dropped on Australia.  Furthermore, we
know of a number of companies using ipf with modification like us, who
are now in the same situation, and we hope that some of them will work
with us to fill this gap that now exists in OpenBSD (temporarily, we
hope).

16 slices per disk instead of 8 previously ; and tidy things a bit

in some MAKEDEVs, will see to them in a separate commit.

during installs where there is no MAKEDEV.local.

add rm -f to mk()

Removed MI *dev_decl() stuff that is now in sys/conf.h

Add fd to all; stdin, stdout, and stderr to std