[RFC] Additional soft-reservations for PHP 7

Hi internals! In a previous thread on the topic [1] I promised to create an RFC for the soft-reservation of 'void', similar to a bunch of other reservations we have done for PHP 7. The RFC also includes 'enum' as an additional independent proposal, as I think this will likely be needed in 7.x. If you have further suggestions for names or keywords that we are likely to need, please point them out. https://wiki.php.net/rfc/additional_soft_reservations_for_php7 Thanks, Nikita [1]: http://markmail.org/message/ovvnz5p2o6q7ebjl