Fix vulnerability in handling _session argument of utils/save-prefs (#1489382)

Aleksander Machniak

2013-10-17 037af6890fe6fdb84a08d3c86083e847c90ec0ad

 program/steps/mail/sendmail.inc

@@ -462,6 +462,7 @@
}

// exec hook for header checking and manipulation
// Depracated: use message_before_send hook instead
$data = $RCMAIL->plugins->exec_hook('message_outgoing_headers', array('headers' => $headers));

// sending aborted by plugin