disable DATABASE_BACKED_SESSIONS by default

config.php-dist

@@ -100,8 +100,8 @@
 	define('DAEMON_SLEEP_INTERVAL', 120);
 	// Interval between update daemon update runs
 
-	define('DATABASE_BACKED_SESSIONS', true);
+	define('DATABASE_BACKED_SESSIONS', false);
-	// Store session information in a database (recommended)
+	// Store session information in a database
 	// Uses default PHP session storing mechanism if disabled
 
 	define('SESSION_CHECK_ADDRESS', true);