[Distutils] Sourceforge finally fixed???

[Phillip J. Eby]

I just noticed today that Sourceforge now appears to have a sane download 
system in place, at long last!  Download URLs now point to 
downloads.sourceforge.net instead of prdownloads, and they automatically 
select a mirror and redirect to it.  If the mirror doesn't have the file, 
it redirects *back* to downloads.sf.net with a failed_mirror=mirror_name, 
so that the redirector can pick another mirror.

So, in essence, the Sourceforge folks have automated easy_install's mirror 
selection and retry facility, which means that the code for doing that can 
possibly be dropped from future versions of easy_install.

The new download system appears to be intended to support easier end-user 
downloads as well as automated downloads, so my guess is that the feature 
is here to stay.  So, I plan to back out my experimental "heroic measures" 
code (using 'sf-mirrors.telecommunity.com' to get mirror IPs to try), 
leaving the older prdownloads support in place for the time 
being.  Fortunately, the newer code is only in the 0.6c4 trunk, and not in 
any officially released version, so the experimental DNS mirroring will not 
be supported in the 0.6c4 final release, allowing me to drop that 
(automatically generated) zone from my DNS.

Yay!