VERSION 0.5.6 : 2006-07-10
--------------------------
FIXED
    * session.class.php
      : changed that sql query does not include server IP if IP tracking disabled
      
VERSION 0.5.3 : 2006-02-28
--------------------------
FIXED
    * login.php
      : fixed next call function

VERSION 0.5.2 : 2006-02-24
--------------------------
FIXED
    * session.class.php 
      : updated error codes
      
VERSION 0.5.1 : 2006-02-16
--------------------------
FIXED
    * session.class.php 
      : set server_ip to REMOTE_ADDR