We do this for the classes of the core and bundled extensions only, for now.
This also allows us to remove some slightly incorrect and unnecessary copy
and paste documentation, where inherited constants have been explicitly
documented for child classes.
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@345662 c90b9560-bf6c-de11-be94-00142212c4b1
