PHP_INI_SYSTEM and httpd.conf

Hello core folks. Please see this table: http://php.net/manual/en/ini.php#AEN189095 As long as I can remember, the manual has said that PHP_INI_SYSTEM is settable in httpd.conf. I just ran some tests, and it seems that this is not the case. Seems these are only settable in php.ini. The manual even goes far as to distinguish between "php.ini only" (disable_classes, for example), and PHP_INI_SYSTEM. So, am I just missing something, or is the manual wrong? Could someone clarify in unambiguous terms the credentials for changing a setting that is PHP_INI_SYSTEM? (sorry for the crosspost) Thanks, S