PF test for inclusion

[Joerg Sonnenberger]

Hi all,
the patch ftp://dragonflybsd.dyndns.org/patches/testing/pf.diff
is the joint work of Max Laier, Devon O'Dell, Simon Schubert and
likely some others as well. With the addition of the changes from
me to use direct entries on pkthdr instead of mbuf tags I think we
can finally commit this.

Please test it and provide me with any feedback.

Time to commit: Sunday

Joerg