refs #308 Instead of enumerating hosts, use the well known host url

Since we are hosting in the same process, we can get the URL from the host
object and pass it to new clients.

src/plugins/simulator/fs9/fs9_client.h

@@ -46,6 +46,9 @@ namespace BlackSimPlugin
             //! Destructor
             virtual ~CFs9Client();
 
+            //! Set DirectPlay host address
+            void setHostAddress(const QString &hostAddress);
+
             //! Add new aircraft situation
             void addAircraftSituation(const BlackMisc::Aviation::CAircraftSituation &situation);