aufs3 and aufs4 GIT release

[s***@users.sourceforge.net]

o news
- linux-v4.7 is released and aufs4.7 branch too.

o bugfix
- the positive value from aufs_atomic_open().
- aufs-util.git, fix error_at_line() support for musl libc by Natanael
Copa.

o misc
- a delayed-free approach is implemented to gain a performance.
- minor optimization, reduce the spin lock in au_hfput().
- minor, convert a plain list for dynop to hlist.
- Revert "aufs: convert nw_len into percpu_counter".
- aufs-util.git, a new helper script "auplink_ftw" to support non-glibc,
reported by Natanael Copa.


J. R. Okajima

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- aufs3-linux.git
aufs: tiny, remove an unnecessary initialization
aufs: tiny, fix a jump label
aufs: minor optimization, reduce the spin lock in au_hfput()
aufs: minor, delayed free 1/2, kmem_cache_free
aufs: minor, delayed free 2/2, kfree
aufs: minor, limit the vdir name hash length
aufs: fix, delayed free 1/3, kmem_cache_free()
aufs: fix, delayed free 2/3, kfree()
aufs: delayed free 3/3, free_page()
aufs: minor, convert a plain list for dynop to hlist
aufs: for auplink in aufs-util.git, test all ancestors pid
aufs: bugfix, the positive value from aufs_atomic_open()
Revert "aufs: convert nw_len into percpu_counter"

- aufs3-standalone.git
ditto

- aufs4-linux.git
ditto

- aufs4-standalone.git
ditto

- aufs-util.git
auplink_ftw to support non-glibc

Natanael Copa (1):
fix error_at_line() support for musl libc

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