TLS_client_method
ctx = SSL_CTX_new(TLS_client_method());
s_client_config.meth = TLS_client_method();
s_time_meth = TLS_client_method();
const SSL_METHOD *TLS_client_method(void); /* TLS v1.0 or later */
return TLS_client_method();
meth = TLS_client_method();