Require stronger ordering to sample final counter values on shutdown.

Signed-off-by: Jason Volk <jason@zemos.net>

src/router/serve/tls.rs

@@ -79,21 +79,22 @@ pub(super) async fn serve(
 	let handle_active = server
 		.metrics
 		.requests_handle_active
-		.load(Ordering::Relaxed);
+		.load(Ordering::Acquire);
+
 	debug_info!(
 		handle_finished = server
 			.metrics
 			.requests_handle_finished
-			.load(Ordering::Relaxed),
+			.load(Ordering::Acquire),
 		panics = server
 			.metrics
 			.requests_panic
-			.load(Ordering::Relaxed),
+			.load(Ordering::Acquire),
 		handle_active,
 		"Stopped listening on {addrs:?}",
 	);
 
-	debug_assert!(handle_active == 0, "active request handles still pending");
+	debug_assert_eq!(0, handle_active, "active request handles still pending");
 
 	Ok(())
 }