Ref T298, split military flag into check for civilian/military

* in military -> only military aircraft?
* in civilian -> only civilian aircraft?

src/blackmisc/simulation/simulatedaircraft.h

@@ -345,6 +345,9 @@ namespace BlackMisc
             //! VTOL aircraft?
             bool isVtol() const;
 
+            //! Is military aircraft
+            bool isMilitary() const;
+
             //! Combined ICAO / color string
             QString getCombinedIcaoLiveryString(bool networkModel = false) const;