php: Fix crash for PHP 5.3 < 5.3.8

include/class.auth.php

 <?php
 
 interface AuthenticatedUser {
+/* PHP 5.3 < 5.3.8 will crash with some abstract inheritance issue
+ * ------------------------------------------------------------
     // Get basic information
     function getId();
     function getUsername();
@@ -20,6 +22,7 @@ interface AuthenticatedUser {
     // Signal method to allow performing extra things when a user is logged
     // into the sysem
     function onLogin($bk);
+ */
 }
 
 abstract class BaseAuthenticatedUser

include/class.client.php

@@ -427,11 +427,14 @@ interface EmailContact {
 }
 
 interface ITicketUser {
+/* PHP 5.3 < 5.3.8 will crash with some abstract inheritance issue
+ * ------------------------------------------------------------
     function isOwner();
     function flagGuest();
     function isGuest();
     function getUserId();
     function getTicketId();
     function getTicket();
+ */
 }
 ?>