Detect when command line max protocol < min protocol

Detect when command line max protocol < min protocol

Due to the increased default minimum protocol
level to SMB2, some users notice that
specifying smbclient -m NT1 fails with
NT_STATUS_CONNECTION_DISCONNECTED, with no SMB
traffic on the wire. Report when the max protocol
is set less than the min protocol.

Signed-off-by: David Mulder <dmulder@suse.com>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Noel Power <npower@samba.org>
Autobuild-User(master): Noel Power <npower@samba.org>
Autobuild-Date(master): Tue Nov 12 17:52:28 UTC 2019 on sn-devel-184