AP_Scripting: expand to 6 SCR_USER parameters

libraries/AP_Scripting/AP_Scripting.cpp

@@ -106,6 +106,18 @@ const AP_Param::GroupInfo AP_Scripting::var_info[] = {
     // @User: Standard
     AP_GROUPINFO("USER4", 8, AP_Scripting, _user[3], 0.0),
 
+    // @Param: USER5
+    // @DisplayName: Scripting User Parameter5
+    // @Description: General purpose user variable input for scripts
+    // @User: Standard
+    AP_GROUPINFO("USER5", 10, AP_Scripting, _user[4], 0.0),
+
+    // @Param: USER6
+    // @DisplayName: Scripting User Parameter6
+    // @Description: General purpose user variable input for scripts
+    // @User: Standard
+    AP_GROUPINFO("USER6", 11, AP_Scripting, _user[5], 0.0),
+    
     // @Param: DIR_DISABLE
     // @DisplayName: Directory disable
     // @Description: This will stop scripts being loaded from the given locations

libraries/AP_Scripting/AP_Scripting.h

@@ -51,7 +51,7 @@ public:
     void handle_mission_command(const AP_Mission::Mission_Command& cmd);
 
    // User parameters for inputs into scripts 
-   AP_Float _user[4]; 
+   AP_Float _user[6];
 
     struct terminal_s {
         int output_fd;