LU-85 Update some URLs and text to reflect our releases.

LU-85 Update some URLs and text to reflect our releases.

The text and URLs in the debian packaging metadata were old
(circa Sun Microsystems), so update them and take the opportunity
to inform about the source of the release being installed.

Signed-off-by: Brian J. Murrell <brian@whamcloud.com>
Change-Id: I23e87c0f093e4da208f4b66873ea9849fa62cc25
Reviewed-on: http://review.whamcloud.com/906
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Hudson