DKIM: document Ed25519 private key generation under OpenSSL (1.1.1+)

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 726f3af8a2268034f80c7e9c9a11ae83c1f24639..978d51fd7e59f78bcbd51d7652be086e27a74363 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -38948,8 +38948,9 @@ The "_CRYPTO_SIGN_ED25519" macro will be defined if support is present
 for EC keys.
 
 As of writing, producing EC key materials is not well supported
-by the major libraries.  GnuTLS 3.6.0 can create a private key:
+by the major libraries.  OpenSSL 1.1.1 and GnuTLS 3.6.0 can create private keys:
 .code
+openssl genpkey -algorithm ed25519 -out dkim_ed25519.private
 certtool --generate-privkey --key-type=ed25519 --outfile=dkim_ed25519.private
 .endd