[PATCH 0/9][COSMIC/UNSTABLE] Make /sys/class/net per net namespace objects belong to container

[Tyler Hicks]

BugLink: https://launchpad.net/bugs/1784501
Origin: https://lore.kernel.org/lkml/1532123814-1109-1-git-send-email-tyhicks@canonical.com/
Origin: https://lore.kernel.org/lkml/1532727207-10912-1-git-send-email-tyhicks@canonical.com/

Clean cherry picks from linux-next to cosmic/master-next and to
unstable/master. I've performed builds and tests with both kernels.
Testing was successful and verified that libvirt could create and
configure its default bridge.

Tyler