SSL_group_to_name
BIO_printf(out, "%s", SSL_group_to_name(s, nid));
BIO_printf(out, "%s", SSL_group_to_name(s, nid));
SSL_group_to_name(s, SSL_get_negotiated_group(s)));
const char *SSL_group_to_name(SSL *s, int id);
SSL_group_to_name(serverssl, SSL_get_shared_group(serverssl, 0))))
if (!TEST_str_eq(SSL_group_to_name(serverssl, shared_group0),
group_name_client = SSL_group_to_name(clientssl, negotiated_group_client);