mkfs: Don't emit default config message yet

mkfs: Don't emit default config message yet

Until we have more than one possible source of configuration,
there is no need to emit the only possibility and clutter
the output.  We can decide how it should all look when we
get more than one source.

Apply some i18n to the config description, though.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>