* cli/cli-decode.h (CMD_ASYNC_OK): New define.

	* cli/cli-decode.h (CMD_ASYNC_OK): New define.
	(set_cmd_async_ok, get_cmd_async_ok): Declare.
	* cli/cli-decode.c (set_cmd_async_ok): New function.
	(get_cmd_async_ok): New function.
	* cli/cli-cmds.c (init_cli_cmds): Mark "pwd", "help", "info", and
	"show" as async-ok.
	* top.c (execute_command): Use get_cmd_async_ok.
	* infcmd.c: Include cli/cli-decode.h.
	(_initialize_infcmd): Mark "interrupt" as async-ok.
	* Makefile.in (infcmd.o): Depend on cli_decode_h.