Since DV recommended keeping the build instructions distributed with the
source, move them from the old FAQ to the downloads page.

Just removing reverences to the deprecated CVS server and the old git
on et.redhat.com

* docs/downloads.html.in: but will remain for sake of old links.

* docs/downloads.html[.in]: update the secton about
the server on git.et.redhat.com based on the plans
Jim posted.

* docs/downloads.html docs/downloads.html.in: update download
  informations after switch to git
daniel

Atsushi