docs: Update documentation for scoping.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@2651 44740490-163a-0410-bde0-09ae8108e29a

docs/simplesamlphp-scoping.txt

@@ -84,13 +84,13 @@ were involved in the authentication of the user, SimpleSAMLphp addes the
 AuthenticatingAuthority elements.
 
 The list of authenticating authorities (the AuthenticatingAuthority element) 
-can be retrived as an array from the session object.
+can be retrived as an array from the authentication data.
+
+    # Get the authentication source.
+    $as = new SimpleSAML_Auth_Simple();
 
-    # Get the current persistent authentication state
-    $authstate = $session->getAuthState();
-    
     # Get the AuthenticatingAuthority
-    $aa = $authstate['saml:AuthenticatingAuthority'];
+    $aa = $as->getAuthData('saml:AuthenticatingAuthority');
 
 Support
 -------