s3: nmbd: Ensure NetBIOS names are only 15 characters stored.

This screws up if the name is greater than MAX_NETBIOSNAME_LEN-1 in the
unix charset, but less than or equal to MAX_NETBIOSNAME_LEN-1 in the DOS
charset, but this is so old we have to live with that.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>

Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Tue Nov  4 18:23:11 CET 2014 on sn-devel-104
btrfs: don't leak opened directory handle

Closing a directory handle file descriptor via close() is undefined,
according to:
http://pubs.opengroup.org/onlinepubs/9699919799/functions/dirfd.html

Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Tue Nov  4 20:51:02 CET 2014 on sn-devel-104