Patch to add support for advertising FULLSYNC to Mac OSX Clients

[Christoph Hellwig]

Coming in late here, but I would suggest that the Samba team
reconsiders implementing the flush commands properly, as in not
being a no-op.  Except for the Apple world with it's odd FULLSYNC
fcntl fsync/fdatasync is _the_ primitive to guarantee data integrity,
and a major file sever that simply ignores it is a major disaster for
the full storage stack.