Improve TigerVNC branding in WinVNC

Avoids conflicts with the original RealVNC implementation, or any
other forks of that code.
diff --git a/win/winvnc/VNCServerService.cxx b/win/winvnc/VNCServerService.cxx
index 481df21..14be6da 100644
--- a/win/winvnc/VNCServerService.cxx
+++ b/win/winvnc/VNCServerService.cxx
@@ -29,7 +29,7 @@
 using namespace rfb;
 using namespace win32;
 
-const TCHAR* winvnc::VNCServerService::Name = _T("WinVNC4");
+const TCHAR* winvnc::VNCServerService::Name = _T("TigerVNC Server");
 
 VNCServerService::VNCServerService()
   : Service(Name)