ndr64 support

[ronnie sahlberg]

List

Does samba support the NDR64 transfer syntax?
This was introduced in 2008 and makes alignment better for various
fields.

I just noticed that when I use libsmb2 against samba 4.10 it always reject
NDR64 as an unsupported transfer syntax and instead always pick NDR32.
If I disable NDR32 support then the bind will fail completely with no
suitable transfer syntaxes.

I am testing against 4.10. Which is reasonable new.

regards
ronnie sahlberg