NEED_ARG
#define need_arg(o) ((o)->flags & NEED_ARG)
#define permit_arg(o) ((o)->flags & (NEED_ARG | OPT_ARG))
{ "user", user_option, NEED_ARG },
{ "group", group_option, NEED_ARG },
{ "umask", umask_option, NEED_ARG },
{ "linger", linger_option, NEED_ARG },
{ "spawn", spawn_option, NEED_ARG | EXPAND_ARG },
{ "twist", twist_option, NEED_ARG | EXPAND_ARG | USE_LAST },
{ "setenv", setenv_option, NEED_ARG | EXPAND_ARG },
{ "severity", severity_option, NEED_ARG },
{ "banners", banners_option, NEED_ARG },