fsck.gfs2: fsck.gfs2: Sync di_nlink adding links for lost+found
From: Bob Peterson <email@example.com>
When adding a ".." entry to a directory newly linked to lost+found
fsck.gfs2 needs to update its di_nlink value to account for the new
link. If not, it can "correct" the di_nlink value to the wrong
value and not find the error until a second fsck.gfs2 is done.
This only happens in the rare case where there is no pre-existing
".." entry that may be reused to re-link to lost+found.