Use the `visiblity' parameter to determine the initial state of

Use the `visiblity' parameter to determine the initial state of
	the frame, instead of the `iconic-startup' and
	`suppress-initial-map'.
	* xfns.c (x_icon): Test the Qvisibility parameter against Qicon,
	instead of the Qiconic_startup against Qt.
	(x_create_frame): Test Qvisibility against Qnil and
	Qicon, instead of testing Qsuppress_initial_map and Qvisibility.
	(Qicon): New symbol.
	(Qiconic_startup, Qsuppress_icon, Qsuppress_initial_map): Removed.
	(syms_of_xfns): Adjusted appropriately.

	* xfns.c [not HAVE_X11] (x_create_frame): Check Qicon_type,
	instead of Qsuppress_icon.

	* xfns.c (x_set_visibility): Instead of interpreting only Qt as
	`make the frame visible' and everything else as `iconify the
	frame', interpret Qicon as `iconify the frame' and everything else
	as `make the frame visible.'

	* xfns.c (x_get_arg): When the type of the resource is `symbol',
	return `true' and `on' as Qt, and `false' and `off' as Qnil.