pfPorts/php53 sync: Update to 5.3.26 (FreeBSD Ports r320210)

PHP's quoted_printable_encode is vulnerable to
heap based buffer overflows which has been fixed with 5.3.26.

I've grepped through our repos and didn't find it to be use, 
nonetheless I guess it's better to ship this fixed version.

Upstream message:
Author: flo <flo@FreeBSD.org>
Date:   Fri Jun 7 15:19:27 2013 +0000

    Update to 5.3.26

    Security:   59e7163c-cf84-11e2-907b-0025905a4770