[Catalog-sig] _checkversion.py

[Martin v. Loewis]

> I agree; it never caught on (probably because it doesn't quite do
> what's needed).  I would ask Jack Jansen though, since he created it;
> I bet he's using it for MacPython.  What's the harm in leaving it
> there (with an added comment about obsolescence)?

I have a PyXML bug report that the _checkversion there is outdated, so
I wonder whether I should continue to maintain it, or kill it. Leaving
it, marked as obsolete, is fine with me.

Regards,
Martin