pfPorts: PHP 5.3.21 (sync with FreeBSD ports r310837)

Sync with FreeBSD ports to get PHP 5.3.21.

All previous pfSense-added patches still apply cleanly. For more detailed
description about our local modifications, check the PHP 5.3.19 commit.
Merge pull request #83 from matsimon/php-5.3.21

pfPorts: PHP 5.3.21 (sync with FreeBSD ports r310837)