client max protocol defaults to NT1

[Christof Schmitt]

docs-xml/smbdotconf/protocol/clientmaxprotocol.xml documents the current
config:

    <para>The value <constant>default</constant> refers to the default protocol in each
    part of the code, currently <constant>NT1</constant> in the client tools and
    <constant>SMB3_02</constant> in winbindd.</para>

Is there a reason why the default of client tools is limited to only
NT1? With newer Windows server having the option of disabling SMB1
support, should we change the default to also negotiate higher protocol
dialects?

Christof