AP_CANManager: added scripting2 protocol

allows for lua scripts to distinguish two CAN interfaces

libraries/AP_CANManager/AP_CANDriver.cpp

@@ -31,7 +31,7 @@ const AP_Param::GroupInfo AP_CANManager::CANDriver_Params::var_info[] = {
     // @Param: PROTOCOL
     // @DisplayName: Enable use of specific protocol over virtual driver
     // @Description: Enabling this option starts selected protocol that will use this virtual driver
-    // @Values: 0:Disabled,1:DroneCAN,4:PiccoloCAN,5:CANTester,6:EFI_NWPMU,7:USD1,8:KDECAN,10:Scripting,11:Benewake
+    // @Values: 0:Disabled,1:DroneCAN,4:PiccoloCAN,5:CANTester,6:EFI_NWPMU,7:USD1,8:KDECAN,10:Scripting,11:Benewake,12:Scripting2
     // @User: Advanced
     // @RebootRequired: True
     AP_GROUPINFO("PROTOCOL", 1, AP_CANManager::CANDriver_Params, _driver_type, AP_CANManager::Driver_Type_UAVCAN),

libraries/AP_CANManager/AP_CANManager.h

@@ -64,6 +64,7 @@ public:
         // 9 was Driver_Type_MPPT_PacketDigital
         Driver_Type_Scripting = 10,
         Driver_Type_Benewake = 11,
+        Driver_Type_Scripting2 = 12,
     };
 
     void init(void);