+8. Added the -m parameter to dump which optimises the output for
+ inodes having been changed but not modified since the last dump
+ ('changed' and 'modified' have the meaning defined in stat(2)).
+ For those inodes, dump will save only the metadata, instead of
+ saving the entire inode contents. Inodes which are either
+ directories or have been modified since the last dump are saved
+ in a regular way. Uses of this flag must be consistent, meaning
+ that either every dump in an incremental dump set have the flag,
+ or no one has it.
+