Branch b1_6

Description: MDS may lose file striping (and hence file data) in some cases
Details    : If there are additional extended attributes stored on the MDS,
	     in particular ACLs, SELinux, or user attributes (if user_xattr
	     is specified for the client mount options) then there is a risk
	     of attribute loss.  Additionally, the Lustre file striping
	     needs to be larger than default (e.g. striped over all OSTs),
	     and an additional attribute must be stored initially in the
	     inode and then increase in size enough to be moved to the
	     external attribute block (e.g. ACL growing in size) for file
	     data to be lost.
i=kalpak.shah
i=alex.zhuravlev
b=15777

Sync ChangeLog from b_release_1_6_5.