[Rpm-metadata] xml update

[seth vidal]

> Oh absolutely. That's what I was getting to, just failed to express it
> in a way everybody understands apparently :)
> 
> One set of fields which *must* be there for depsolvers to work, other
> namespace for optional, apparently common data which depsolvers could
> use.

Ah ha! ok - then that makes more sense. I thought you were recommending
that all things anyone needs be made mandatory and I was slowly going
insane here trying to figure out where to get that data.

thanks
-sv