Ports using USES=php:phpize, php:ext, php:zend, and php:pecl are now
flavored. They will automatically get flavors (php56, php70, php71, php72)
depending of the versions they support (set with IGNORE_WITH_PHP). As a
consequence, ports using USES=pear and USES=horde are also flavored.
PR: 226242
Submitted by: mat
Exp-run by: antoine
Approved by: portmgr
Sponsored by: Absolight
Differential Revision: https://reviews.freebsd.org/D14208
