Remove QueryConnectionHandler

Make things simpler by making this a part of the SDesktop interface
that always needs to be implemented.
diff --git a/win/winvnc/VNCServerWin32.cxx b/win/winvnc/VNCServerWin32.cxx
index 93bf5c0..771ef78 100644
--- a/win/winvnc/VNCServerWin32.cxx
+++ b/win/winvnc/VNCServerWin32.cxx
@@ -71,9 +71,7 @@
 
   // Initialise the desktop
   desktop.setStatusLocation(&isDesktopStarted);
-
-  // Initialise the VNC server
-  vncServer.setQueryConnectionHandler(this);
+  desktop.setQueryConnectionHandler(this);
 
   // Register the desktop's event to be handled
   sockMgr.addEvent(desktop.getUpdateEvent(), &desktop);