SSL_stateless
i = SSL_stateless(con);
__owur int SSL_stateless(SSL *s);
if (!TEST_false(SSL_stateless(ssl)))
|| !TEST_int_eq(SSL_stateless(serverssl), -1))
|| !TEST_int_eq(SSL_stateless(serverssl), 0))
|| !TEST_int_eq(SSL_stateless(serverssl), 0)
|| !TEST_int_eq(SSL_stateless(serverssl), 1)