SSL_CTRL_GET_MIN_PROTO_VERSION
SSL_CTX_ctrl(ctx, SSL_CTRL_GET_MIN_PROTO_VERSION, 0, NULL)
SSL_ctrl(s, SSL_CTRL_GET_MIN_PROTO_VERSION, 0, NULL)
case SSL_CTRL_GET_MIN_PROTO_VERSION:
case SSL_CTRL_GET_MIN_PROTO_VERSION: