autocomplete menu entry should have type=MENU_CALLBACK

The autocomplete callback entry was set to type MENU_LOCAL_TASK which created a blank tab in a page's menu, which, when clicked, would generate a page full of of autocomplete data. While this is only available to users with 'add related links' permissions, it's an annoyance and possibly a performance issue if you have a site where anonymous users have that permission -- think of all the bots slamming that database query...

Here's what I changed the menu definition to on my system (note that I added a title entry, as for some reason I couldn't make the tab go away without it - not sure if it was something related to the cache mechanism.)

    $items[] = array(
      'title' => 'Related Links Autocomplete',
      'path' => 'relatedlinks/autocomplete',
      'callback' => 'relatedlinks_autocomplete',
      'callback arguments' => array(arg(2)),
      'access' => user_access('add related links'),
      'type' => MENU_CALLBACK, //  MENU_LOCAL_TASK,
      'weight' => 2
    );