message: refactor(server): add debug log when server accepts new connection
diff: @@ -373,6 +373,8 @@ impl<S, B> Server<S, B>
  // Future for our server's execution
  let srv = incoming.for_each(|socket| {
  let addr = socket.remote_addr;
  + debug!("accepted new connection ({})", addr);
  +
  let addr_service = SocketAddrService::new(addr, new_service.new_service()?);
  let s = NotifyService {
  inner: addr_service,
  