In particular, this fixes the oddity that -dumpl would apply
umask to copied dirs (which are created in the target tree)
but not to "copied" files (which are only linked). After
this change:
$ ls -ld a a/b a/b/c
d--x-w-r-- 3 tim tim 512 Jul 29 20:08 a
drwxr----x 3 tim tim 512 Jul 29 20:09 a/b
dr----x-w- 2 tim tim 512 Jul 29 20:09 a/b/c
$ (echo a; echo a/b; echo a/b/c) | cpio -dumpl o
$ cd o
$ ls -ld a a/b a/b/c
d--x-w-r-- 3 tim tim 512 Jul 29 20:08 a
drwxr----x 3 tim tim 512 Jul 29 20:09 a/b
dr----x-w- 2 tim tim 512 Jul 29 20:09 a/b/c
1e5899ea8b