compact and more efficient code.

	* grub-core/kern/list.c (grub_list_push): Moved from here ...
	* include/grub/list.h (grub_list_push): ... to here. Set prev.
	(grub_list_remove): Moved from here ...
	* include/grub/list.h (grub_list_remove): ... here. Use and set prev.
	(grub_prio_list_insert): Set prev.
	* include/grub/list.h (grub_list): Add prev. All users updated.

	users updated.
	(GRUB_COMMAND_FLAG_MENU): Likewise.
	(GRUB_COMMAND_FLAG_BOTH): Likewise.
	(GRUB_COMMAND_FLAG_TITLE): Removed.
	(GRUB_COMMAND_FLAG_NO_ECHO): Likewise.
	(GRUB_COMMAND_FLAG_EXTCMD): Moved into enum.
	(GRUB_COMMAND_FLAG_DYNCMD): Likewise.
	(GRUB_COMMAND_FLAG_BLOCKS): Likewise.
	(grub_command_flags_t): New enum. All users updated.

	* commands/help.c (grub_cmd_help): Print the command name before the
	summary.
	(GRUB_MOD_INIT): Remove command name from the summary.
	* kern/command.c (GRUB_MOD_INIT): If summary is null assign an empty
	strig as summary.
	* lib/arg.c (find_long): Print the command name before the summary.
	* commands/acpi.c (GRUB_MOD_INIT): Remove command name from the
	summary.
	* commands/blocklist.c (GRUB_MOD_INIT): Likewise.
	* commands/cat.c (GRUB_MOD_INIT): Likewise.
	* commands/cmp.c (GRUB_MOD_INIT): Likewise.
	* commands/configfile.c (GRUB_MOD_INIT): Likewise.
	* commands/crc.c (GRUB_MOD_INIT): Likewise.
	* commands/date.c (GRUB_MOD_INIT): Likewise.
	* commands/echo.c (GRUB_MOD_INIT): Likewise.
	* commands/efi/loadbios.c (GRUB_MOD_INIT): Likewise.
	* commands/gptsync.c (GRUB_MOD_INIT): Likewise.
	* commands/handler.c (GRUB_MOD_INIT): Likewise.
	* commands/hdparm.c (GRUB_MOD_INIT): Likewise.
	* commands/hexdump.c (GRUB_MOD_INIT): Likewise.
	* commands/i386/cpuid.c (GRUB_MOD_INIT): Likewise.
	* commands/i386/pc/halt.c (GRUB_MOD_INIT): Likewise.
	* commands/i386/pc/play.c (GRUB_MOD_INIT): Likewise.
	* commands/i386/pc/pxecmd.c (GRUB_MOD_INIT): Likewise.
	* commands/keystatus.c (GRUB_MOD_INIT): Likewise.
	* commands/loadenv.c (GRUB_MOD_INIT): Likewise.
	* commands/ls.c (GRUB_MOD_INIT): Likewise.
	* commands/lspci.c (GRUB_MOD_INIT): Likewise.
	* commands/memrw.c (GRUB_MOD_INIT): Likewise.
	* commands/minicmd.c (GRUB_MOD_INIT): Likewise.
	* commands/parttool.c (GRUB_MOD_INIT): Likewise.
	* commands/password.c (GRUB_MOD_INIT): Likewise.
	* commands/probe.c (GRUB_MOD_INIT): Likewise.
	* commands/read.c (GRUB_MOD_INIT): Likewise.
	* commands/search.c (GRUB_MOD_INIT): Likewise.
	* commands/sleep.c (GRUB_MOD_INIT): Likewise.
	* commands/test.c (GRUB_MOD_INIT): Likewise.
	* commands/xnu_uuid.c (GRUB_MOD_INIT): Likewise.
	* efiemu/main.c (GRUB_MOD_INIT): Likewise.
	* font/font_cmd.c (GRUB_MOD_INIT): Likewise.
	* gettext/gettext.c (GRUB_MOD_INIT): Likewise.
	* kern/corecmd.c (GRUB_MOD_INIT): Likewise.
	* lib/arg.c (GRUB_MOD_INIT): Likewise.
	* loader/efi/appleloader.c (GRUB_MOD_INIT): Likewise.
	* loader/i386/bsd.c (GRUB_MOD_INIT): Likewise.
	* loader/xnu.c (GRUB_MOD_INIT): Likewise.
	* mmap/mmap.c (GRUB_MOD_INIT): Likewise.
	* term/terminfo.c (GRUB_MOD_INIT): Likewise.
	* video/readers/jpeg.c (GRUB_MOD_INIT): Likewise.
	* video/readers/png.c (GRUB_MOD_INIT): Likewise.
	* video/readers/tga.c (GRUB_MOD_INIT): Likewise.

        Misc cleanup.

        * kern/command.c (grub_register_command_prio): Use
        grub_zalloc() instead of explicitly zeroing data.
        * kern/list.c: Include `<grub/mm.h>'.
        (grub_named_list_find): Replace `0' with `NULL'.
        * normal/autofs.c (struct grub_fs_module_list): Remove ad-hoc type.
        (fs_module_list): Change type to `grub_named_list_t'.  Update all
        users.
        * normal/dyncmd.c (read_command_list): Add space between function
        call and parenthesis.
        * normal/handler.c (read_handler_list): Likewise.

	* commands/blocklist.c: Add include file <grub/command.h>, remove
	<grub/normal.h> and <grub/arg.h>.
	(grub_cmd_blocklist): Use the new command interface.
	(GRUB_MOD_INIT): Likewise.
	(GRUB_MOD_FINI): Likewise.
	* commands/boot.c: Likewise.
	* commands/cat.c: Likewise.
	* commands/cmp.c: Likewise.
	* commands/configfile.c: Likewise.
	* commands/crc.c: Likewise.
	* commands/echo.c: Likewise.
	* commands/halt.c: Likewise.
	* commands/handler.c: Likewise.
	* commands/hdparm.c: Likewise.
	* commands/help.c: Likewise.
	* commands/hexdump.c: Likewise.
	* commands/loadenv.c: Likewise.
	* commands/ls.c: Likewise.
	* commands/lsmmap.c: Likewise.
	* commands/lspci.c: Likewise.
	* commands/loadenv.c: Likewise.
	* commands/read.c: Likewise.
	* commands/reboot.c: Likewise.
	* commands/search.c: Likewise.
	* commands/sleep.c: Likewise.
	* commands/test.c: Likewise.
	* commands/usbtest.c: Likewise.
	* commands/videotest.c: Likewise.
	* commands/i386/cpuid.c: Likewise.
	* commands/i386/pc/halt.c: Likewise.
	* commands/i386/pc/play.c: Likewise.
	* commands/i386/pc/pxecmd.c: Likewise.
	* commands/i386/pc/vbeinfo.c: Likewise.
	* commands/i386/pc/vbetest.c: Likewise.
	* commands/ieee1275/suspend.c: Likewise.
	* disk/loopback.c: Likewise.
	* font/font_cmd.c: Likewise.
	* hello/hello.c: Likewise.
	* loader/efi/appleloader.c: Likewise.
	* loader/efi/chainloader.c: Likewise.
	* loader/i386/bsd.c: Likewise.
	* loader/i386/efi/linux.c: Likewise.
	* loader/i386/ieee1275/linux.c: Likewise.
	* loader/i386/linux.c: Likewise.
	* loader/i386/pc/chainloader.c: Likewise.
	* loader/i386/pc/linux.c: Likewise.
	* loader/powerpc/ieee1275/linux.c: Likewise.
	* loader/multiboot_loader.c: Likewise.
	* term/gfxterm.c: Likewise.
	* term/i386/pc/serial.c: Likewise.
	* term/terminfo.c: Likewise.

	* term/i386/pc/vesafb.c: Removed <grub/arg.h>.
	* term/i386/pc/vga.c: Likewise.
	* video/readers/jpeg.c: Likewise.
	* video/readers/png.c: Likewise.
	* video/readers/tga.c: Likewise.

	* util/grub-fstest (cmd_loopback): Removed.
	(cmd_blocklist): Likewise.
	(cmd_ls): Likewise.
	(grub_register_command): Likewise.
	(grub_unregister_command): Likewise.
	(execute_command): Use grub_command_find to locate command and execute
	it.

	* include/grub/efi/chainloader.h: Removed.
	* loader/efi/chainloader_normal.c: Likewise.
	* loader/i386/bsd_normal.c: Likewise.
	* loader/i386/pc/chainloader_normal.c: Likewise.
	* loader/i386/pc/multiboot_normal.c: Likewise.
	* loader/linux_normal.c: Likewise.
	* loader/multiboot_loader_normal.c: Likewise.
	* loader/powerpc/ieee1275/linux_normal.c: Likewise.

	* gencmdlist.sh: Scan new registration command grub_register_extcmd
	and grub_register_command_p1.

	* conf/common.rmk (grub_fstest_SOURCES): Add kern/list.c,
	kern/command.c, lib/arg.c and commands/extcmd.c.
	(pkglib_MODULES): Remove boot.mod, and minicmd.mod and extcmd.mod.
	(minicmd_mod_SOURCES): New variable.
	(minicmd_mod_CFLAGS): Likewise.
	(minicmd_mod_LDFLAGS): Likewise.
	(extcmd_mod_SOURCES): Likewise.
	(extcmd_mod_CFLAGS): Likewise.
	(extcmd_mod_LDFLAGS): Likewise.
	(boot_mod_SOURCES): Removed.
	(boot_mod_CFLAGS): Likewise.
	(boot_mod_LDFLAGS): Likewise.

	* conf/i386-pc.rmk (kernel_img_SOURCES): Add kern/command.c and
	kern/corecmd.c.
	(kernel_img_HEADERS): Add command.h.
	(grub_emu_SOURCES): Remove commands/boot.c and normal/arg.c, add
	commands/minicmd.c, kern/command.c, kern/corecmd.c, commands/extcmd.c
	and lib/arg.c.
	(pkglib_MODULES): Change _linux.mod, _chain.mod, _bsd.mod and
	_multiboot.mod as linux.mod, chain.mod, bsd.mod and multiboot.mod,
	remove the corresponding normal mode command.
	(normal_mod_SOURCES): Remove normal/arg.c.
	* conf/i386-coreboot.rmk: Likewise.
	* conf/i386-efi.rmk: Likewise.
	* conf/i386-ieee1275.rmk: Likewise.
	* conf/powerpc-ieee1275.rmk: Likewise.
	* conf/x86_64-efi.rmk: Likewise.

	* include/grub/arg.h: Move from here ...
	* include/grub/lib/arg.h: ... to here.

	* normal/arg.c: Move from here ...
	* lib/arg.c: ... to here.

	* commands/extcmd.c: New file.
	* commands/minicmd.c: Likewise.
	* include/grub/command.h: Likewise.
	* include/grub/extcmd.h: Likewise.
	* kern/command.c: Likewise.
	* kern/corecmd.c: Likewise.

	* kern/list.c (grub_list_iterate): Return int instead of void.
	(grub_list_insert): New function.
	(grub_prio_list_insert): Likewise.

	* kern/rescue.c (grub_rescue_command): Removed.
	(grub_rescue_command_list): Likewise.
	(grub_rescue_register_command): Likewise.
	(grub_rescue_unregister_command): Likewise.
	(grub_rescue_cmd_boot): Move to minicmd.c
	(grub_rescue_cmd_help): Likewise.
	(grub_rescue_cmd_info): Likewise.
	(grub_rescue_cmd_boot): Likewise.
	(grub_rescue_cmd_testload): Likewise.
	(grub_rescue_cmd_dump): Likewise.
	(grub_rescue_cmd_rmmod): Likewise.
	(grub_rescue_cmd_lsmod): Likewise.
	(grub_rescue_cmd_exit): Likewise.
	(grub_rescue_print_devices): Moved to corecmd.c.
	(grub_rescue_print_files): Likewise.
	(grub_rescue_cmd_ls): Likewise.
	(grub_rescue_cmd_insmod): Likewise.
	(grub_rescue_cmd_set): Likewise.
	(grub_rescue_cmd_unset): Likewise.
	(attemp_normal_mode): Use grub_command_find to get normal module.
	(grub_enter_rescue_mode): Use grub_register_core_commands to register
	commands, remove grub_rescue_regiter_command calls.

	* normal/command.c (grub_regiser_command): Removed.
	(grub_unregister_command): Likewise.
	(grub_command_find): Likewise.
	(grub_iterate_commands): Likewise.
	(rescue_command): Likewise.
	(export_command): Moved to corecmd.c.
	(set_command): Removed.
	(unset_command): Likewise.
	(insmod_command): Likewise.
	(rmmod_command): Likewise.
	(lsmod_command): Likewise.
	(grub_command_init): Likewise.

	* normal/completion.c (iterate_command): Use cmd->prio to check for
	active command.
	(complete_arguments): Use grub_extcmd_t structure to find options.
	(grub_normal_do_completion): Change function grub_iterate_commands to
	grub_command_iterate.

	* normal/execute.c (grub_script_execute_cmd): No need to parse
	argument here.

	* normal/main.c (grub_dyncmd_dispatcher): New function.
	(read_command_list): Register unload commands as dyncmd.
	(grub_cmd_normal): Use new command interface, register rescue,
	unregister normal at entry, register normal, unregister rescue at exit.

	* include/grub/list.h (grub_list_test_t): New type.
	(grub_list_iterate): Return int instead of void.
	(grub_list_insert): New function.
	(GRUB_AS_NAMED_LIST_P): New macro.
	(GRUB_AS_PRIO_LIST): Likewise.
	(GRUB_AS_PRIO_LIST_P): Likewise.
	(GRUB_PRIO_LIST_PRIO_MASK): New constant.
	(GRUB_PRIO_LIST_FLAG_ACTIVE): Likewise.
	(grub_prio_list): New structure.
	(grub_prio_list_insert): New function.
	(grub_prio_list_remove): New inline function.

	* include/grub/normal.h: Remove <grub/arg.h>, add <grub/command.h>.
	(GRUB_COMMAND_FLAG_CMDLINE): Moved to command.h.
	(GRUB_COMMAND_FLAG_MENU): Likewise.
	(GRUB_COMMAND_FLAG_BOTH): Likewise.
	(GRUB_COMMAND_FLAG_TITLE): Likewise.
	(GRUB_COMMAND_FLAG_NO_ECHO): Likewise.
	(GRUB_COMMAND_FLAG_NO_ARG_PARSE): Removed.
	(GRUB_COMMAND_FLAG_NOT_LOADED): Likewise.
	(grub_command): Likewise.
	(grub_register_command): Likewise.
	(grub_command_find): Likewise.
	(grub_iterate_commands): Likewise.
	(grub_command_init): Likewise.
	(grub_arg_parse): Likewise.
	(grub_arg_show_help): Likewise.

	* include/grub/rescue.h (grub_rescue_register_command): Removed.
	(grub_rescue_unregister_command): Likewise.

	* include/grub/i386/bsd.h: Remove grub_rescue_cmd_freebsd,
	grub_rescue_cmd_openbsd, grub_rescue_cmd_netbsd,
	grub_rescue_cmd_freebsd_loadenv and grub_rescue_cmd_freebsd_module.

	* include/grub/i386/efi/loader.h: Remove grub_rescue_cmd_linux and
	grub_rescue_cmd_initrd.
	* include/grub/i386/loader.h: Likewise.
	* include/grub/x86_64/loader.h: Likewise.

	* include/grub/i386/pc/chainloader.h: Remove grub_chainloader_cmd.