message: chore(examples): fix echo compilation without NLL
diff: @@ -21,17 +21,17 @@ fn echo(req: Request<Body>) -> BoxFut {
  match (req.method(), req.uri().path()) {
  // Serve some instructions at /
  - (Method::GET, "/") => {
  + (&Method::GET, "/") => {
  *response.body_mut() = Body::from("Try POSTing data to /echo");
  }
  // Simply echo the body back to the client.
  - (Method::POST, "/echo") => {
  + (&Method::POST, "/echo") => {
  *response.body_mut() = req.into_body();
  }
  // Convert to uppercase before sending back to client.
  - (Method::POST, "/echo/uppercase") => {
  + (&Method::POST, "/echo/uppercase") => {
  let mapping = req.into_body().map(|chunk| {
  chunk
  .iter()
  @@ -48,7 +48,7 @@ fn echo(req: Request<Body>) -> BoxFut {
  // the chunks as they arrive. So, this returns a different
  // future, waiting on concatenating the full body, so that
  // it can be reversed. Only then can we return a `Response`.
  - (Method::POST, "/echo/reversed") => {
  + (&Method::POST, "/echo/reversed") => {
  let reversed = req.into_body().concat2().map(move |chunk| {
  let body = chunk.iter().rev().cloned().collect::<Vec<u8>>();
  *response.body_mut() = Body::from(body);
  