Add gtk_print_unix_dialog_set_manual_capabilities that controls what

Add gtk_print_unix_dialog_set_manual_capabilities that controls what

2006-05-24  Alexander Larsson  <alexl@redhat.com>

	* gtk/gtk.symbols:
	* gtk/gtkprintunixdialog.[ch]:
	Add gtk_print_unix_dialog_set_manual_capabilities that controls
	what widgets to enable in the dialog depending on the apps
	capabilities.

	* gtk/gtkprintbackend.[ch]:
	* gtk/gtkprinter-private.h:
	* gtk/gtkprinter.c:
	* gtk/gtkprintjob.h:
	Add printer_get_capabilities to backend.
	Move some fallback calls to the printbackend base class.

	* gtk/gtkprintoperation-unix.c:
	Set manual capabilities

	* modules/printbackends/cups/gtkprintbackendcups.c:
	Implement get_capabilities

	* modules/printbackends/lpr/gtkprintbackendlpr.c:
	* modules/printbackends/pdf/gtkprintbackendpdf.c:
	Move some methods to baseclass.