Linux 4.7 rc3

You all know the drill, so sing along now: "Another week, another rc".

Nothing particularly odd has been going on. As promised, rc3 has the
fix for the NFS issue that was pending last rc. Not that anybody seems
to have noticed (also as expected).

The diffstat looks fairly normal and innocuous. There's more of a
filesystem component to it than usual, but that's mostly some added
new btrfs tests, and if you ignore that part it's all the normal
stuff: drivers dominate (gpu and networking drivers are the bulk, but
there's i2c, rdma, ...) with some arch updates, and general networking
code. And the usual random stuff all over.

But it all is pretty small. Shortlog appended for people who like to
get a quick overview of the details.