pfPorts: PHP 5.3.20 (sync with FreeBSD ports r310164)

Sync with FreeBSD ports, suck in 5.3.20 which is likely one of
the last PHP 5.3 releases containing more than just security fixes.

All previous pfSense-added patches still apply cleanly. For more
detailed description on where and why our port deviates from FreeBSD
ports, check the PHP 5.3.19 commit.

Upstream r310163 contained the effective version but we sync against:
	Author: flo <flo@FreeBSD.org>
	Date:   Wed Jan 9 21:58:12 2013 +0000

   	Restore mistakenly removed  PORTREVISION?=