[pf4freebsd] altq for freebsd 0.4.2

[Dennis Berger]

new release.
from changelog
----------------
release 0.4.2
import if_vrreg.h this should avoid the kernelpanic
MFC if_tun, if_vr, buildrelease script fix
tag the tree RELENG_5_1
altqsupport for ex (10mbit eepro/10) driver
release 0.4.1

regards,
    db