Index: branches/RC/core/kernel/session/session.php
===================================================================
diff -u -N -r10372 -r10458
--- branches/RC/core/kernel/session/session.php	(.../session.php)	(revision 10372)
+++ branches/RC/core/kernel/session/session.php	(.../session.php)	(revision 10458)
@@ -739,8 +739,12 @@
 	}
 
 	/**
-	 * Returns SID from cookie
+	 * Returns SID from cookie.
 	 *
+	 * Use 2 cookies to have 2 expiration:
+	 * - 1. for normal expiration when browser is not closed (30 minutes by default), configurable
+	 * - 2. for advanced expiration when browser is closed
+	 *
 	 * @return int
 	 */
 	function GetSessionCookie()