SSL_OP_ENABLE_KTLS_TX_ZEROCOPY_SENDFILE
SSL_CTX_set_options(ctx, SSL_OP_ENABLE_KTLS_TX_ZEROCOPY_SENDFILE);
if (rl->direction == OSSL_RECORD_DIRECTION_WRITE && (rl->options & SSL_OP_ENABLE_KTLS_TX_ZEROCOPY_SENDFILE) != 0)
SSL_FLAG_TBL("KTLSTxZerocopySendfile", SSL_OP_ENABLE_KTLS_TX_ZEROCOPY_SENDFILE),
SSL_OP_ENABLE_KTLS_TX_ZEROCOPY_SENDFILE)))