IPFW2 layer2 support broken.

[Jeffrey Hsu]

Erik P. Skaalerud wrote:
This isnt exactly on topic with the subject, but perhaps its time to 
remove IPFW and natd? We have PF in base, wich in my opinion is 
superiour to IPFW..

(please, do not start a flame war, I'm just asking here).

- Erik
Now that we have IPFW2 working (or will soon) thanks to Gary Allan's
tracking down the problem with ethernet headers, I wouldn't mind
getting rid of IPFW1.