Connection between BFD/BGP alarms and its outgoing interface

[runborg]

Today, when a bgp or bfd neighbor goes down there are no connection between this alarm and what physical interface it is connected to.

But as zino collects at least all ip adresses used on each device (and probably also its subnet-mask?) it could be possible to trace back its connected interface for this neighborship. This information could then be available to the client so it could be displayed to the user to make it easier to show the connection between "port down" and "bgp alarms".

This will only work for directly connected neighbours, and not for multihop neighbours, but i think at least in our net we have 99% singlehop neighbors.. so this will work for almost all neighbors but might not for all.

[runborg]

i think both outgoing ifname and ifalias could at least be fetched to the bgp and bfd cases.