code: func New(addr string, store Store) *http.Server {
  	if store == nil {
  		store = NewMemoryStore()
  	}
  	h := &Handler{store: store}
  	return &http.Server{
  		Addr:    addr,
  		Handler: h,
  	}
  }
docs: // the actual work is done on the handler.go
  // here we just provide a helper for the main package to create
  // an http.Server and serve a cache remote service, without any user touches
  // New returns a http.Server which hosts
  // the server-side handler for the remote cache service.
  //
  // it doesn't listens to the server