Fix memory leak in server

Remove server instrumentation

ws-server/server.go

@@ -49,6 +49,7 @@ func (server *WSServer) HandleNew(conn *websocket.Conn) {
 		close(wsconn.WriteChan)
 		close(wsconn.ErrorChan)
 		log.Printf("Client %d: disconnected due to %+v, now %d clients", wsconn.id, err, len(server.connections))
+		wsconn.conn.Close()
 		delete(server.connections, wsconn)
 	}()
 }