PHPCAS-44 Fix proxy validation for proxy tickets starting with ST
PHPCAS-44 Fix proxy validation for proxy tickets starting with ST

git-svn-id: 94f0db08461a0213b6c0921e79b985cd37b48048@20221 f5dbab47-78f9-eb45-b975-e544023573eb

neopeak/phpCAS,rakesh-mohanta/phpCAS,snelg/phpCAS,chand3040/phpCAS,mickelfeng/phpCAS,yangchunyong/phpCAS,fh/phpCAS,Jasig/phpCAS