php: Don't use ( in comment in the custom config.

php: Don't use ( in comment in the custom config.

For some weird reason, using a ( in a comment in my local php.ini makes
PHP stop parsing the php.ini right there. Not sure why that is... It
seems that using parentheses is ok in the main config file. Perhaps it's
because the custom config isn't in the [PHP] section (but creating a
second [PHP] section doesn't help either...)