remove 'primary' concept from entrance slugs. tested.

templates/cave_debug.html

@@ -8,17 +8,17 @@
 <h2 id="cmult">Entrances</h2>
 <table>
 <tr><th>ent</th>
-<th>cached_primary_slug</th>
+<th>cached_slug</th>
 <th>N slugs</th>
 <th>slugs</th>
 </tr>
 {% for ent in ents %}
 <tr>
   <td>
-     {{ent}}
+     #{{ent.id}} {{ent}}
   </td>
   <td>
-    {{ent.cached_primary_slug}}
+    {{ent.cached_slug}}
   </td>
     <td>
     {{ent.entranceslug_set.all|length }}