opt_string
if (!opt_string(point_format, point_format_options))
if (!opt_string(asn1_encoding, asn1_encoding_options))
if (!opt_string(point_format, point_format_options))
if (!opt_string(asn1_encoding, asn1_encoding_options))
int opt_string(const char *name, const char **options);
if (!opt_string(point_format, point_format_options))
if (!opt_string(asn1_encoding, asn1_encoding_options))
{ "string", required_argument, 0, opt_string },
case opt_string: