For a while now, we've had https://waffle.freedesktop.org/

 and somewhat
recently the original waffle-gl.org domain expired.

Update (nearly) all the existing references. Be that waffle-gl.org ones
or people.freedesktop.org/~chadversary/waffle. The latter redirect to
the former.

Nearly since some archive.waffle-gl.org artefacts are nowhere to be
found ... at a glance. We can tweak or drop those with future commits.

While we're here - httpS all the links :-)

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>