PHPCAS-69 The CAS_ProxyChain now allows PCRE regex pattern modifiers.

See: http://www.php.net/manual/reference.pcre.pattern.modifiers.php

Allowed modifiers:
	i (PCRE_CASELESS)
	x (PCRE_EXTENDED)
	A (PCRE_ANCHORED)
	S
	U (PCRE_UNGREEDY)
	X (PCRE_EXTRA)
	u (PCRE8)

Disallowed modifiers:
	m (PCRE_MULTILINE)      URLs should only ever be a single line, so this doesn't apply.
	s (PCRE_DOTALL)         URLs should only ever be a single line, so this doesn't apply.
	e (PREG_REPLACE_EVAL)   No replacements are being done, so this doesn't apply.
	D (PCRE_DOLLAR_ENDONLY) URLs should only ever be a single line, so this doesn't apply.
	J (PCRE_INFO_JCHANGED)  No subpatterns are being extracted, so this doesn't apply.

git-svn-id: https://source.jasig.org/cas-clients/phpcas/branches/PHPCAS-69@24840 f5dbab47-78f9-eb45-b975-e544023573eb

source/CAS/ProxyChain.php

@@ -69,7 +69,7 @@ public function matches(array $list) {
 			$mismatch = false;
 			foreach ($this->_chain as $i => $search) {
 				$proxy_url = $list[$i];
-				if (preg_match('/^\/.*\//',$search)) {
+				if (preg_match('/^\/.*\/[ixASUXu]*$/s',$search)) {
 					if (preg_match($search, $proxy_url)) {
 						phpCAS::trace("Found regexp " .  $search . " matching " . $proxy_url);
 					} else {