adding stubs to auth plugin to stop adminplugins whinging

htdocs/auth/internal/lib.php

@@ -196,9 +196,13 @@ class AuthInternal extends Auth {
  */
 class PluginAuthInternal extends Plugin {
 
-    static function has_config() {
+    public static function has_config() {
         return true;
     }
+
+    public static function get_config_options() {
+        return array();
+    }
 }
 
 ?>