BN_swap() exchanges the values of I<a> and I<b>.
-L<bn(3)>
+=head1 RETURN VALUES
+
+BN_swap() does not return a value.
=head1 COPYRIGHT
-Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy