Added support for per-screen options in the configuration file

and sending those options to the appropriate client screens.
Currently, two options are supported:  halfDuplexCapsLock and
halfDuplexNumLock mark the caps lock and num lock keys,
respectively, as being half-duplex.

lib/client/CSecondaryScreen.cpp

@@ -87,6 +87,9 @@ CSecondaryScreen::open()
 
 		// subclass hook
 		onPostOpen();
+
+		// reset options
+		resetOptions();
 	}
 	catch (...) {
 		close();