NTLM: when NTLMv1 is requested, try NTLMv2 instead

NTLM: when NTLMv1 is requested, try NTLMv2 instead

Commit 21910ebc2ee8a6138eb2af8d38056d2b94e59f9c removed
support for NTLMv1 authentication. This adjusts the
behavior for existing configurations that specify
"ntlm" keyword.

Do not error out hard, instead just try to upgrade. This
should work fine in many cases and will avoid breaking
user configs unnecessarily on upgrade.

In addition it fixes an issue with the mentioned patch
where "auto" wasn't working correctly for NTLM anymore.

Change-Id: Iec74e88f86cd15328f993b6cdd0317ebda81563c
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Arne Schwabe <arne-openvpn@rfc2549.org>
Message-Id: <20240118151242.12169-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/search?l=mid&q=20240118151242.12169-1-gert@greenie.muc.de
Signed-off-by: Gert Doering <gert@greenie.muc.de>