b=5781

b=5781
r=adilger (original patch)

Severity   : minor
Frequency  : rare (only HPUX clients mounting unsupported re-exported NFS vol)
Bugzilla   : 5781
Description: an HPUX NFS client would get -EACCESS when ftruncate()ing a newly
             created file with mode 000
Details    : the Linux NFS server relies on an MDS_OPEN_OWNEROVERRIDE hack to
	     allow an ftruncate() as a non-root user to a file with mode 000.
	     Lustre now respects this flag to disable mode checks when
	     truncating a file owned by the user