[Python-Dev] Bumping autoconf from 2.68 to 2.69

[Charles-François Natali]

> My understanding is that we use a specific version of autoconf.
> The reason is that otherwise we end up with useless churn in the repo
> as the generated file changes when different committers use different
> versions.  In the past we have had issues with a new autoconf version
> actually breaking the Python build, so we also need to test a new version
> before switching to it.

Well, so I guess all committers will have to use the same
Linux/FreeBSD/whatever distribution then?
AFAICT there's no requirement regarding the mercurial version used by
committers either.

Charles