Fix util-linux lintian override.
Take over last, lastb, mesg, mountpoint, and sulogin from sysvinit.

Note that we Replaces, but not Breaks, initscripts and sysvinit-utils.
The is because the new version of these packages Pre-Depends on us,
so adding a Breaks: on old versions would cause a dependency loop.
Normally dpkg would be able to handle that by deconfiguring the old
version first, but it refuses to do that with an Essential Package.

( However, adding a Breaks on old versions of a replaced package in the
replacing package is only required in order to prevent the removal of the
replacing package without the replaced package being upgrade. So when
the replacing package is Essential, and therefore can't be removed, the
Breaks is not realy necessary. )