Fix #1231

README

 LemonLDAP::NG
-====================
+=============
 
 LemonLDAP::NG is a modular Web-SSO based on Apache::Session modules.
 You can find documentation here:
  * for administrators: http://lemonldap-ng.org/
- * for developers: see embedded perldoc
+ * for developers: see also embedded perldoc
+
+UPGRADE
+-------
+
+See https://lemonldap-ng.org/documentation/<version>/upgrade or
+https://lemonldap-ng.org/documentation/latest/upgrade
+
+LICENSE AND COPYRIGHT
+---------------------
 
 LemonLDAP::NG is a free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by