return values missing in try_bind

[fala13]

try_bind doesn't return anything, contrary to it's description and doesn't seem usable at all in current form.

warp/src/server.rs

Lines 182 to 203 in 1cbf029

	/// Bind to a socket address, returning a `Future` that can be
	/// executed on any runtime.
	///
	/// In case we are unable to bind to the specified address, resolves to an
	/// error and logs the reason.
	pub async fn try_bind(self, addr: impl Into<SocketAddr>) {
	let addr = addr.into();
	let srv = match try_bind!(self, &addr) {
	Ok((_, srv)) => srv,
	Err(err) => {
	tracing::error!("error binding to {}: {}", addr, err);
	return;
	}
	};
	srv.map(|result| {
	if let Err(err) = result {
	tracing::error!("server error: {}", err)
	}
	})
	.await;
	}

should probably behave like try_bind_ephemeral
https://github.com/seanmonstar/warp/blob/master/src/server.rs#L227-L247