Show the new setting portal_tickets in the default config file

git-svn-id: http://svn.code.sf.net/p/itop/code/trunk@2962 a333f486-631f-4898-b8df-5754b55c2be0

core/config.class.inc.php

@@ -674,7 +674,7 @@ class Config
 			'default' => 'UserRequest',
 			'value' => 'UserRequest',
 			'source_of_value' => '',
-			'show_in_conf_sample' => false,
+			'show_in_conf_sample' => true,
 		),
 	);