Prevent iproute2 from being installed from wheezy-backports (Closes: #7337).

This package has "Priority: important", so it's automatically installed by
tasksel or similar early during the Tails/Wheezy boot process. But it conflicts
with Wheezy's iproute, that is itself installed later, and then iproute2 is
deinstalled, but not purged. To fix that, and make the build process clearer,
let's prevent iproute2 from being installed from wheezy-backports entirely.

Note that iproute2 is not part of Wheezy. The chosen pinning section only
affects wheezy-backports, so that it should be innocuous when we start migrating
to Jessie.
Merge branch 'master' of git://git.tails.boum.org/tails into translation
Create the tails-persistence-setup user with the same UID/GID it had on Tails/Squeeze. (Closes: #7343)

Else, our various checks for safe access rights on persistence.conf fail,
as the ACL stores numerical UID values, and the saved UID does not match
the one tails-persistence-setup gets in Tails 1.1~beta1.

Also remove the --quiet flag: it makes adduser silently ignore failures in
case a user with the same UID already exists.

Also rename the hook to create the tails-persistence-setup user before others,
so that its UID is still free.

Note that we cannot use the mutually exclusive --gid and --group when calling
adduser. That's why we create the group first, with the desired GID.
Merge branch 'master' of git://git.tails.boum.org/tails into translation
(fr) FAQ: tiny fixes
(fr) FAQ: translations
(fr) translation gardening
(fr) fix link
(fr) tranlate index page
Merge branch 'master' of git://git.tails.boum.org/tails into translation
Merge branch 'master' of git://git.tails.boum.org/tails into translation
Merge remote branch 'matsa/translation' into translation
tiny fix on index page
Merge remote-tracking branch 'mercedes508/translation'
Merge remote-tracking branch 'origin/testing' into testing

Conflicts:
	config/chroot_local-includes/etc/iceweasel/pref/000-tor-browser.js
updated PO files
Link to the last batch of MFSA.
Merge branch 'master' of ssh://webmasters.boum.org/~/wiki
updated PO files
Revert "Open local documentation with Yelp." (Closes: #7390, #7285)

This reverts commit 200bf88af7c1db51b2e6551d4aa0391cc8781530.

Yelp in Wheezy has quite some issues in our usecase, and the browser
issue that made us move to Yelp has vanished.