Problem: Peers are incorrectly kept alive by UDP beacons after TCP connection has dropped.
Problem: Peers are incorrectly kept alive by UDP beacons after TCP connection has dropped.

Solution: With "any" interface selected, peers are kept alive by beacon messages (which broadcast on all interfaces) even when the TCPconnection between node-peer has been disconnected. Instead don't allow beacons to refresh the peer and only refresh on a TCP message.
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