discovery+server: make RebroadcastInterval part of config

server.go

@@ -720,6 +720,7 @@ func newServer(listenAddrs []net.Addr, chanDB *channeldb.DB,
 		ProofMatureDelta:        0,
 		TrickleDelay:            time.Millisecond * time.Duration(cfg.TrickleDelay),
 		RetransmitDelay:         time.Minute * 30,
+		RebroadcastInterval:     time.Hour * 24,
 		WaitingProofStore:       waitingProofStore,
 		MessageStore:            gossipMessageStore,
 		AnnSigner:               s.nodeSigner,