Mk/Uses/php.mk was introduced in June 2016 and we still have the
compat variables available for users. This is unneccessary clutter
in the ports framework.
Depends on D15012
All instances of `WANT_PHP_*`, `USE_PHPIZE`, `USE_PHPEXT`, `USE_ZENDEXT` and `USE_PHP_BUILD` have been removed from ports with commits earlier today. rP466789 rP466790 rP466792 rP466793 rP466794 rP466796 rP466797 rP466799