rl(4) update

[Joerg Sonnenberger]

Hi all,
the patch at http://leaf.dragonflybsd.org/~joerg/if_rl.patch syncs our
rl(4) with FreeBSD and adds some more cleanups. With the exception of
changing some CVS IDs, I'd like to commit this soon. This features e.g.
CardBus support :)

time-for-commit: Wednesday

Joerg