A port of Cumulus BFD daemon to a more portable daemon.\\ \\ Bidirectional Forwarding Detection (BFD) is a network protocol that is used to\\ detect faults between two forwarding engines connected by a link. It provides\\ low-overhead detection of faults even on physical media that doesn't support\\ failure detection of any kind, such as Ethernet, virtual circuits, tunnels and\\ MPLS Label Switched Paths.\\ \\