Implement forwarding client CR_RESPONSE messages to management

Implement forwarding client CR_RESPONSE messages to management

When signalling the client that it should do Challenge response
without reconnecting (IV_SSO=crtext/INFOPRE=CR_TEXT), the server
needs forward the response via the management console.

Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: David Sommerseth <davids@openvpn.net>
Message-Id: <20200519220004.25136-6-arne@rfc2549.org>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg19910.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>