Try to reconnect on a regular basis
When we start Duniter with WS2P private enabled, the node tries to connect to known peers.
But then later on if we loose all of our connections that were established on new Peer reception, we might end in a situation with no connection at all! If the connection is only made on new Peer event, then we cannot have any new connection. We get isolated.
Thus, a solution would be to retry initial connections on a regular basis, or when the number of connected nodes becomes too low.