Add tracker validation for uploaded torrent

templates/create.html

@@ -7,6 +7,7 @@ vim: ts=2 noexpandtab
 {% block content %}
 	<link href="{{ url_for("static", filename="css/create.css") }}" rel="stylesheet">
 	<script src="{{ url_for("static", filename="js/create.js") }}"></script>
+	<script>var validtracker = "{{ ",".join(tracker) }}".split(",")</script>
 	<div>
 		<h2 class="headline">{{ _("Create new torrent") }}</h2>
 		{% if errors %}