[Distutils] [Catalog-sig] Prototype setuptools-specific PyPI index.

["Martin v. Löwis"]

> Yup. So, ATM:
> 
>   Using old PyPI takes about 1m5s
>   Using simple takes about       25s
>   Using ppix  takes about            8s

Thanks!

> Again, I assume that the difference between simple and ppix has more to
> do with geography than the difference between serving statically and
> dynamically. The simple page has more links on it than the ppix page,
> because I haven't gotten around to scarf all links off of a
> restructured-text rendering of long description.  I doubt that makes any
> difference.  It will be interesting to try again after I fix that.

If you think that the /simple pages are correct, it might be easier to
just mirror them instead of doing all the work yourself.

I don't plan to take that service offline, unless experimentation
shows it has serious flaws.

Regards,
Martin