Pull up following revision(s) (requested by rmind in ticket #726):
etc/rc.d/npf: revision 1.3
distrib/sets/lists/base/mi: revision 1.1010
usr.sbin/npf/npfctl/Makefile: revision 1.9
distrib/sets/lists/comp/mi: revision 1.1785
put in /sbin
catch up with npfctl moving to /sbin.
untested, but i guess so was the move itself ;)
mv npfctl from /usr/sbin to /sbin so it is available before /usr is mounted.