Identify JavaScript as AGPL-3.0-only for LibreJS

This commit introduces LibreJS compatible `@license' blocks as per
https://www.gnu.org/software/librejs/free-your-javascript.html

The magnet URI can be opened in a BitTorrent client to retrieve a copy
of the GNU AGPL 3.0 license. Section 3.2.2.1 from the above link has
a list of magnet URIs for various free software licenses.

todosrht/templates/ticket.html

@@ -476,7 +476,7 @@
 
 {% block scripts %}
 <script type="text/javascript">
-
+// @license magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt AGPL-3.0-only
 {% include "autocomplete.js" %}
 
 (function() {
@@ -497,5 +497,6 @@
     });
   }
 })();
+// @license-end
 </script>
 {% endblock %}

todosrht/templates/tracker-access.html

@@ -192,6 +192,7 @@
 
 {% block scripts %}
 <script type="text/javascript">
+// @license magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt AGPL-3.0-only
   {% include "autocomplete.js" %}
 
   (function() {
@@ -202,5 +203,6 @@
       autocomplete.register();
     }
   })();
+// @license-end
 </script>
 {% endblock %}