New rbh-find output to display stat info.

Added the -lsstat command line option. Each file is output like:
 [file,31532,12790,23,1365022640,1365022640,1365022640]=/mnt/lustre/foo

Format is [type, uid, gid, size, ctime, mtime, atime]=file name
New rbh-find output to list every file's OSTs.

Added -lsost.
(WIP) Store uid and gid in the database, instead of names.

That replaces the owner and gr_name attributes with uid and gid.

rbh-find now understands uid and group when passed as --user and --group.

TODO: request with wildcards in username or group names are not
supported.
Scan a Lustre tree of any depth.

The scanning is now done from /mount_point/.lustre/fid/ instead of the regular Linux path.
Several compile fixes.
Fix for test 700 when CL_CLOSE is not issued (Lustre 2.1).
Save changelog open parameters since we reuse them later.
Reorganize cl_get_one() to support filesystem unmounts/remounts.

Previously, unmounting the filesystem would stop the changelog
reader, leaving Robinhood running with no purpose.
Now, the thread will stop only in --once mode. Otherwise it will
regularly try to re-open the filesystem.