generate documentation from config.sample.php

admin_manual/configuration_server/config_sample_php_parameters.rst

@@ -333,6 +333,8 @@ read-only user backend like LDAP), you can specify a custom link, where the
 user is redirected to, when clicking the "reset password" link after a failed
 login-attempt.
 
+In case you do not want to provide any link, replace the url with 'disabled'
+
 Mail Parameters
 ---------------