tron: add auto redirect to the subject

subjects/tron/index.html

@@ -5,6 +5,7 @@
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
   <link rel="shortcut icon" type="image/x-icon" href="data:image/x-icon;base64,AAABAAEAEBAQAAEABAAoAQAAFgAAACgAAAAQAAAAIAAAAAEABAAAAAAAgAAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAx42QAFP/FABXQkMAQC0uAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAAQBEREREREREAFEREREREQQAURERERERBABREREREREEAFEREREREQQAURERERERBABQERAAEREEAFCBEIiREQQAUQgRERERBABRAJEREREEAFAJEREREQQAUJERERERBABRERERERDEAEREREREREQQAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA">
+  <script>location.pathname.endsWith('/') || (location.pathname += '/')</script>
 <style>
 body {
   background: #13191a;