Support DHCP in rc.firewall by default?

[Roderick van Domburg]

Right now, rc.firewall isn't set up to support DHCP configurations although
it could easily be done so. Googling comes up with many references, for
example http://www.freebsddiary.org/firewall.php (section "ipfw with DHCP
etc" at the bottom of the page).

Are there any reasons against having rc.firewall contain such lines? I
reckon it would even come in handy for statically configured users: they'd
only need to specify their network interface(s) once.

Roderick