2009-11-20  Vladimir Serbinenko  <phcoder@gmail.com>

	Use flag-based instead of hook-based video mode selection and "auto"
	keyword.

	* include/grub/video.h (grub_video_adapter): Changed 'setup' member.
	(grub_video_set_mode): Changed prototype. All users updated.
	(grub_video_check_mode_flag): New inline function.
	* video/video.c (parse_modespec): New function.
	(grub_video_set_mode): Parse flags and keywords.