Update the changed functions for 5.6 from UPGRADING.


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@333043 c90b9560-bf6c-de11-be94-00142212c4b1
Update the global constants for PHP 5.6 from UPGRADING.

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@333044 c90b9560-bf6c-de11-be94-00142212c4b1