* normal/execute.c (grub_script_exec_argument_to_string): Check for undefined variable.
(grub_script_execute_cmdline): Reset grub_errno.
* normal/main.c (read_config_file): Reset grub_errno.
* normal/parse.y (script_init): New.
(script): Move function and menuentry here.
(delimiter): New.
(command): Add delimiter at the end of command.
(commands): Adjust to match the new command.
(commandblock): Remove grub_script_lexer_record_start.
(menuentry): Add grub_script_lexer_record_start, use the new commands.
(if): Use the new commands.
* conf/common.rmk (pkgdata_MODULES): Add echo.mod.
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