Obsoleting python2.1, python2.2 in Hoary

[Matt Zimmerman]

With the Python 2.4 transition well in hand in Hoary (thanks to Matthias and
the others who worked on this), it is time to think about which versions of
Python we will support in Hoary.

I propose that we drop Python 2.1 and Python 2.2 at least, and perhaps
consider dropping Python 2.3 as well if we don't find any regressions in
2.4.

Thoughts?

-- 
 - mdz