under OpenSSL version 1.1.1 or later.
9. DKIM operations can now use the Ed25519 algorithm in addition to RSA, under
- GnuTLS 3.6.0 or later.
+ GnuTLS 3.6.0 or OpenSSL 1.1.1 or later.
10. Builtin feature-macros _CRYPTO_HASH_SHA3 and _CRYPTO_SIGN_ED25519, library
version dependent.