core: Merge branch 'th/rh907836_rename_iface'
First set of patches to support renaming of interfaces. This is not yet fully complete, because we need to restart Rdisc too and DHCP6 will disconnect the current active connection. But this already improves the handling a lot, because the device is usable afterwards if re-activating the connection. https://bugzilla.gnome.org/show_bug.cgi?id=726177 https://bugzilla.redhat.com/show_bug.cgi?id=907836 Signed-off-by: Thomas Haller <firstname.lastname@example.org>