New functions to disable/enable individual loaders and to obtain license

New functions to disable/enable individual loaders and to obtain license

Wed Jul  7 23:53:58 2004  Matthias Clasen  <maclas@gmx.de>

	* gdk-pixbuf-io.h:
	* gdk-pixbuf-io.c (gdk_pixbuf_format_is_disabled):
	* gdk-pixbuf-io.c (gdk_pixbuf_format_set_disabled):
	* gdk-pixbuf-io.c (gdk_pixbuf_format_get_license):
	New functions to disable/enable individual loaders and to
	obtain license information about loaders.

	* gdk-pixbuf-io.h (GdkPixbufFormat): Add disabled and
	license fields.

	* gdk-pixbuf-io.c (_gdk_pixbuf_get_module):
	* gdk-pixbuf-io.c (_gdk_pixbuf_get_named_module): Skip
	disabled loaders.

	* io-*.c: Add license information in the fill_info
	functions.