Index: functions.php
===================================================================
--- functions.php	(revision 13182)
+++ functions.php	(working copy)
@@ -2544,6 +2544,19 @@
 	wp_die( $html, $title, array('response' => 403) );
 }
 
+/**
+ * Kill WordPress with a Forbidden permissions error.
+ *
+ * Aliases wp_die() to help break the habit of responding status 500 when
+ * the script is working properly.
+ *
+ * @since 3.0.0
+ * @param string $message Error message.
+ * @param string $title Optional. Error title.
+ */
+function wp_forbid( $message, $title = '') {
+	wp_die( $message, $title, array('response' => 403) );
+}
 
 /**
  * Kill WordPress execution and display HTML message with error message.