Machine Tracker MAC search should also search physical port addresses

[Morten Brekkevold]

While searching cam logs for MAC addresses using the Machine Tracker, any matches from the interface table should be added to the results as well.

Physical interface addresses (ifPhysAddress / MAC addresses) are retrieved and stored by NAV, but are not necessarily camlogged anywhere. There are a myriad of software switches in virtualization infrastructures, however, that will not have accessible forwarding tables that give away the topology of the connected virtual hosts, but will rather report the virtual hosts's MAC address as the physical address of the virtual switch interface the host is "connected" to.

[Morten Brekkevold (mbrekkevold)]

fix here: https://nav.uninett.no/hg/default/rev/e4e5167a0f0c