engine: document the engine app as deprecated
@@ -22,6 +22,8 @@ B<openssl engine>
=head1 DESCRIPTION
+This command has been deprecated. Providers should be used instead of engines.
+
This command is used to query the status and capabilities
of the specified I<engine>s.
Engines may be specified before and after all other command-line flags.
@@ -114,6 +116,10 @@ The path to the engines directory.
L<openssl(1)>,
L<config(5)>
+=head1 HISTORY
+
+This command was deprecated in OpenSSL 3.0.
+
=head1 COPYRIGHT
Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
