Only show local public notices in sitemap

Only show local public notices in sitemap. Only do counts for them
in the sitemap index, and only show them in the notice sitemap.

plugins/Sitemap/Sitemap_notice_count.php

@@ -208,6 +208,7 @@ class Sitemap_notice_count extends Memcached_DataObject
     {
         $notice = new Notice();
         $notice->whereAdd('created BETWEEN "'.$d.' 00:00:00" AND "'.self::incrementDay($d).' 00:00:00"');
+        $notice->whereAdd('is_local = ' . Notice::LOCAL_PUBLIC);
         $n = $notice->count();
 
         return $n;

plugins/Sitemap/noticesitemap.php

@@ -105,7 +105,7 @@ class NoticesitemapAction extends SitemapAction
             $notice->whereAdd("created >= '$begindt'");
             $notice->whereAdd("created <  '$enddt'");
 
-            $notice->whereAdd('is_local != 0');
+            $notice->whereAdd('is_local = ' . Notice::LOCAL_PUBLIC);
 
             $notice->orderBy('created');