e2undo: support the undo header's fs_offset feature

If the fs_offset feature is present (and no "-o offset"
option is specified), e2undo performs the undo operation at
the stored offset.

Signed-off-by: Marcus Huewe <suse-tux@gmx.de>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
1 file changed