docs/appengine/config: add redirect_http_response_code example
docs/appengine/config: add redirect_http_response_code example


GoogleCloudPlatform/golang-samples,adamyanliev/golang-samples,danicat/golang-samples,adamyanliev/golang-samples,danicat/golang-samples,adamyanliev/golang-samples,danicat/golang-samples,GoogleCloudPlatform/golang-samples,adamyanliev/golang-samples,GoogleCloudPlatform/golang-samples