F20 should remain on 3.11.x until release

[Justin M. Forbes]

On Mon, 2013-09-09 at 16:44 +0200, Thorsten Leemhuis wrote:

> And if we ship a major update just days after the release of f20 then we
> negate a lot of testing, too -- but yes, the kernel used on the ISOs
> will be more robust.

This is important because the ISOs don't get updates. We need to insure
that people can install.   This is why a zero day update makes much more
sense than rebasing the release kernel just before release.