LanDiscovery
class LanDiscovery(site: Site, links: WebSocketLinks, wsPort: Int, beaconPort: Int = Beacons.PORT, group: String = Beacons.GROUP, interval: Int)
The sites of the local network found and linked to site (see Beacons), on Node.js: its beacons sent over UDP multicast, to group on beaconPort, every interval milliseconds, with the port of the WebSocket server of links, wsPort. Neither the beacons nor their socket keep Node.js running.