Updating pf(4)?

[David Huang <khym%azeotrope.org@localhost>]

So the pf(4) in NetBSD is pretty ancient (from OpenBSD 4.2)... I get the 
impression that it'd be a significant amount of work to update to a current 
version, but what about updating it to an OpenBSD 4.3 vintage?

In particular, I'm interested in pf.c 1.567: 
http://archives.neohapsis.com/archives/openbsd/cvs/2008-02/0422.html
http://www.openbsd.org/cgi-bin/cvsweb/src/sys/net/pf.c.diff?r1=1.566;r2=1.567

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