bin/117214: ipfw(8) fwd with IPv6 treats input as IPv4

[Willem Jan Withagen]

Lars Eggert wrote:
> Well, one pretty simple (and not always correct) fix would be to assume 
> that if an address has more than 1 colon, it's IPv6.
> 
> The correct fix is to generate a small flex parser.

Which will require to spec an real grammar for the tokens.
In itself of course a "good thing(tm)"

--WjW