In curve25519.h rev. 1.4 to 1.7, tb@ and jsing@ provided
ED25519_keypair(3), ED25519_sign(3), and ED25519_verify(3).
Document them.

prefer https links in man pages
ok gnezdo@ miod@ jmc@

document ECDH_compute_key(3) and ECDH_size(3);
feedback and OK tb@

Add missing include to X25519 synopsis.

jsing@ points out to me that our X25519 interface was copied from
BoringSSL rather than from OpenSSL and that it is not hooked into evp(3).

So delete all text from OpenSSL including the Copyright an

jsing@ points out to me that our X25519 interface was copied from
BoringSSL rather than from OpenSSL and that it is not hooked into evp(3).

So delete all text from OpenSSL including the Copyright and license
and replace it by some text assembled from comments in BoringSSL
code and headers and some text written myself, all under ISC license.
In particular, also describe X25519_keypair(3), add SYNOPSIS, RETURN
VALUES, STANDARDS, and a reference to D. J. Bernsteins instructions
on how to use the algorithm. Delete the text related to EVP_PKEY
describing features we do not support.

show more ...

include more information about how to create keys;
from Matt Caswell <matt at openssl dot org>
via OpenSSL commit f929439f Mar 15 12:19:16 2018 +0000

new X25519(3) manual page;
from Dr. Stephen Henson <steve@openssl.org>, OpenSSL commit d218f3c3