$temp = new admin_settingpage('debugging', get_string('debugging', 'admin'));
$temp->add(new admin_setting_special_debug());
$temp->add(new admin_setting_special_debugdisplay());
+$temp->add(new admin_setting_configcheckbox('xmlstrictheaders', get_string('xmlstrictheaders', 'admin'), get_string('configxmlstrictheaders', 'admin'), 0));
$temp->add(new admin_setting_configcheckbox('debugsmtp', get_string('debugsmtp', 'admin'), get_string('configdebugsmtp', 'admin'), 0));
$temp->add(new admin_setting_special_perfdebug());
$ADMIN->add('server', $temp);