code: func (this *FCGIClient) PostForm(p map[string]string, data url.Values) (resp *http.Response, err error) {
  	body := bytes.NewReader([]byte(data.Encode()))
  	return this.Post(p, "application/x-www-form-urlencoded", body, body.Len())
  }
docs: // PostForm issues a POST to the fcgi responder, with form
  // as a string key to a list values (url.Values)