SSL_CTRL_SELECT_CURRENT_CERT
SSL_CTX_ctrl(ctx, SSL_CTRL_SELECT_CURRENT_CERT, 0, (char *)(x509))
SSL_ctrl(s, SSL_CTRL_SELECT_CURRENT_CERT, 0, (char *)(x509))
case SSL_CTRL_SELECT_CURRENT_CERT:
case SSL_CTRL_SELECT_CURRENT_CERT: