Merge branch 'develop-olympus' into develop

* develop-olympus:
  [ticket/11227] @return void -> @return null in develop-olympus.

phpBB/includes/functions.php

@@ -2856,7 +2856,7 @@ function meta_refresh($time, $url, $disable_cd_check = false)
 *
 * @param int $code HTTP status code
 * @param string $message Message for the status code
-* @return void
+* @return null
 */
 function send_status_line($code, $message)
 {
@@ -4795,7 +4795,7 @@ function phpbb_get_plural_form($rule, $number)
 *
 * @param array	$param		Parameter array, see $param_defaults array.
 *
-* @return void
+* @return null
 */
 function phpbb_http_login($param)
 {