Fix busy loop

src/https.rs

@@ -56,9 +56,16 @@ pub async fn serve_https(
 	let mut connections = FuturesUnordered::new();
 
 	while !*must_exit.borrow() {
+		let wait_conn_finished = async {
+			if connections.is_empty() {
+				futures::future::pending().await
+			} else {
+				connections.next().await
+			}
+		};
 		let (socket, remote_addr) = select! {
 			a = tcp.accept() => a?,
-			_ = connections.next() => continue,
+			_ = wait_conn_finished => continue,
 			_ = must_exit.changed() => continue,
 		};
 
@@ -105,9 +112,7 @@ pub async fn serve_https(
 	drop(tcp);
 
 	info!("HTTPS server shutting down, draining remaining connections...");
-	while !connections.is_empty() {
-		let _ = connections.next().await;
-	}
+	while connections.next().await.is_some() {}
 
 	Ok(())
 }