Possible to reverse directions in gamepad mapping

mappings/default.conf

@@ -10,6 +10,15 @@ abs_ry = 4
 abs_throttle = 6
 abs_rudder = 7
 
+reverse_x = false
+reverse_y = false
+reverse_rx = false
+reverse_ry = false
+reverse_dpad_y = false
+reverse_dpad_x = false
+reverse_throttle = false
+reverse_rudder = false
+
 btn_south = 304
 btn_east = 305
 btn_north = 307