[cifs-protocol] Using file type information from POSIX mode

[Ralph Boehme]

Steve, Paulo,

it seems kernel client doesn't yet implement using file type information 
from the updated POSIX mode as discussed at SDC:

<https://www.samba.org/~slow/SMB3_POSIX/fscc_posix_extensions.html#posix-file-type-definition>

Any plans? Samba already implements this.

Thanks!
-slow