This simplifies some interface matters; namely the initialization and
(later) merging the manifest back into the sync_bitmap if it was
provided.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190709232550.10724-12-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>