It's been a good day: chmod/chown and friends now work for Lustre Light.

It's been a good day: chmod/chown and friends now work for Lustre Light.
 - most of the changes are in the packing.  It will take a little
   bit more time before this completely settles I think, but we have
   a pretty efficient system now.
 - added initial infrastructure for MDS update records.
 - the MDS server has a new routine to change the attributes: the associated
   RPC call is MDS_REINT.
 - Lustre Light is simpler than OBDFS since it doesn't have to
   change inodes when it creates them: that's part of the MDS transactions we
   send over -- removed many "change inode" and "setattr" variants.