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.
Video multiboot support.
* include/grub/multiboot.h (grub_multiboot_set_accepts_video):
New prototype.
* include/multiboot.h: Resynced with multiboot specification.
* include/multiboot2.h: Likewise.
* loader/i386/multiboot.c (UNSUPPORTED_FLAGS): Support video flags.
(grub_multiboot): Parse MULTIBOOT_VIDEO_MODE fields.
* loader/i386/multiboot_mbi.c (DEFAULT_VIDEO_MODE): New constant.
(HAS_VGA_TEXT): Likewise.
(accepts_video): New variable.
(grub_multiboot_set_accepts_video): New function.
(grub_multiboot_get_mbi_size): Account for video structures.
(set_video_mode): New function.
(retrieve_video_parameters): Likewise.
(grub_multiboot_make_mbi): Fill video fields.
* include/grub/i386/loader.h (grub_linux16_boot): Renamed to ...
(grub_linux16_real_boot): ... this.
* kern/i386/loader.S: Likewise.
* loader/i386/pc/linux.c: Include `<grub/video.h>' and `<grub/mm.h>'.
(grub_linux16_boot): New function. Switches to text mode and calls
grub_linux16_real_boot().
* loader/i386/bsd.c: Include `<grub/video.h>'.
(grub_freebsd_boot, grub_openbsd_boot, grub_netbsd_boot): Switch to
text mode before calling grub_unix_real_boot().
* loader/i386/multiboot.c: Include `<grub/video.h>'.
(grub_multiboot_boot): Switch to text mode before calling
grub_relocator32_boot().
* loader/i386/pc/chainloader.c: Include `<grub/video.h>'.
(grub_chainloader_boot): Switch to text mode before calling
grub_chainloader_real_boot().
Fix i386-ieee1275 build.
* loader/i386/ieee1275/linux.c (grub_linux_boot): Use grub_term_width()
and grub_term_height() for video_{width,height} initialization.
Make loader output a bit more user-friendly.
* util/grub.d/10_hurd.in: Print message indicating that GNU Mach
is being loaded. Likewise for the Hurd.
* util/grub.d/10_kfreebsd.in (kfreebsd_entry): Print message indicating
that kernel of FreeBSD ${version} is being loaded.
* loader/i386/linux.c (grub_cmd_linux): Move debug info to
grub_dprintf().
(grub_cmd_initrd): Likewise.
* util/grub.d/10_linux.in (linux_entry): Print message indicating
that Linux ${version} is being loaded. Likewise for initrd.
