[fab] Secondary Arches

[Bill Nottingham]

> +1
> 
> It will will probably also lead to questions like "why doesn't the
> yum.conf from <insert forum, faq, irc, whatever here> not working on
> arch foo". I'd like to avoid that.

I doubt they'd work anyway. You want them with some sort of simple
logical separation for mirrors.

Plus, if someone has to look up the yum repo definition for a core
repository, we are screwing up something bad.

Bill