tls_buffer_append
return tls_buffer_append(ssl->s3->hs.tls13.quic_read_buffer, data, len);
return tls_buffer_append(s->s3->handshake_transcript, buf, len);
int tls_buffer_append(struct tls_buffer *buf, const uint8_t *wbuf, size_t n);
if ((ret = tls_buffer_append(buf, wbuf, rwt->append)) !=