aufs: copy-up on open, doc

Move the description from plan.txt to aufs manual in aufs-util.git.
This commit should have been a part of last release.

Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
aufs: move-up on open 1/2, a new branch attribute

The moo and coo attributes are exclusive and you can specify only one of
them if you specify.

Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
aufs: move-up on open 2/2, core

Implement the move-up on open attribute for the writable branches.
For details, refer to aufs manual in aufs-util.git.

Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
aufs: tiny, remove an unused param

Simply remove unused 'br' parameter from au_wh_test(),
au_sio_lkup_one(), and au_diropq_test().

Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
aufs: dirperm1 1/3, doc

Return of dirperm1 option which had been implemented in aufs1 and
dropped since aufs2.

Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
aufs: dirperm1 2/3, restore the option

For details, see previous commit and aufs manual in aufs-util.git.

Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
aufs: dirperm1 3/3, core

For details, see previous commit and aufs manual in aufs-util.git.

Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
Merge remote-tracking branch 'aufs3-standalone/aufs3.9/00base' into aufs3.9/10static
Merge branch 'aufs3.9/10static' into aufs3.9/11proc_map
Merge branch 'aufs3.9/11proc_map' into aufs3.9/18public