spray dynamic route

proxy.scala

  def receive = {
    case EnableMaster(f) => enableMaster(f)
    case EnableProxy(h, p, f) => enableProxy(Some((h, p, f)))
    case ForecasterClusterSingleton.Started(h, p, f) if h != selfHost || p != selfHttpPort =>
      self ! EnableProxy(h, p, f)
    case m => currentService.foreach(_.forward(m))
  }