Linux 4.4 rc4

Another week, another rc. We had a few more commits than last week
(mostly due to the networking fixes merge), but on the whole it's been
pretty calm.

Everything looks fairly normal: about 70% drivers - network drivers,
gpu, sound, scsi dominate. On top of that we have 15% core networking,
and the rest is split between arch updates and "misc" stuff all over
(including some vfs and core kernel fixes).

The appended shortlog gives the overview of the details, it's small
enough to skim..