[montyedwards]

No idea when LibreSSL will add X25519 or X448, as defined in RFC 7748 - Elliptic Curves for Security.

Here's RFC 7748 https://tools.ietf.org/html/rfc7748

Here's the errata for RFC 7748 https://www.rfc-editor.org/errata_search.php?rfc=7748