void wi_setstr(iface, code, str)
wi_setstr(iface, code, str)
void wi_setstr(iface, code, str)	char			*iface;	int			code;	char			*str;{	struct wi_req		wreq;	if (str == NULL)		errx(1, "must specify string");	bzero((char *)&wreq, sizeof(wreq));	if (strlen(str) > 30)		errx(1, "string too long");	wreq.wi_type = code;	wreq.wi_len = 18;	wreq.wi_val[0] = strlen(str);	bcopy(str, (char *)&wreq.wi_val[1], strlen(str));	wi_setval(iface, &wreq);	return;}