Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/11914)
=over 4
-=item "group-name" (B<OSSL_PKEY_PARAM_GROUP_NAME>) <utf8 string>
+=item "group" (B<OSSL_PKEY_PARAM_GROUP_NAME>) <utf8 string>
The curve name.
=over 4
+=item "group" (B<OSSL_PKEY_PARAM_GROUP_NAME>) <UTF8 string>
+
+This is only supported by X25519 and X448. The group name must be "x25519" or
+"x448" repsectively for those algorithms. This is only present for consistency
+with other key exchange algorithms and is typically not needed.
+
=item "pub" (B<OSSL_PKEY_PARAM_PUB_KEY>) <octet string>
The public key value.