Important: #23178 - New TYPO3_CONF_VARS option FE|pageNotFound_handling_accessdeniedheader 

See forge#23178

Description 

In order to send a correct HTTP header to the browser when access to a page is denied, a new option pageNotFound_handling_accessdeniedheader has been introduced to $GLOBALS['TYPO3_CONF_VARS'] .

The option $GLOBALS['FE']['pageNotFound_handling_accessdeniedheader'] allows to configure the header which defaults to HTTP/1.0 403 Access denied.