code: func (c *Client) RunJobAttached(appID string, job *ct.NewJob) (httpclient.ReadWriteCloser, error) {
  	return c.Hijack("POST", fmt.Sprintf("/apps/%s/jobs", appID), http.Header{"Upgrade": {"flynn-attach/0"}}, job)
  }
docs: // RunJobAttached runs a new job under the specified app, attaching to the job
  // and returning a ReadWriteCloser stream, which can then be used for
  // communicating with the job.