SSLv23_method
LSSL_USED(SSLv23_method);
const SSL_METHOD *SSLv23_method(void); /* SSLv3 or TLSv1.* */
LSSL_ALIAS(SSLv23_method);
if ((ssl_ctx = SSL_CTX_new(SSLv23_method())) == NULL) {
.method = SSLv23_method,