Sometimes interface updates could happen in a way ifnotifier is not
able to catch. For example some heavy operations (device reset) in
netdev-dpdk could require re-applying of the bridge configuration.
For this purpose new manual notifier introduced. Its function
'if_notifier_manual_report()' could be called directly by the code
that aware about changes. This new notifier is thread-safe.
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
Acked-by: Eelco Chaudron <echaudro@redhat.com>
