Remove DES key fixup code

Remove DES key fixup code

This code mainly sets the parity bits in the DES keys. As mbed TLS and
OpenSSL already ignore these bits in the DES key and since DES is
deprecated, remove this special DES code that is not even needed by
the libraries.

Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Max Fillinger <maximilian.fillinger@foxcrypto.com>
Message-Id: <20211019183127.614175-8-arne@rfc2549.org>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg23014.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>