- regression test for the case

thanks tappro.

remove obsolete lgs.sh

add ost add/del test script

some updates in sanity-crypto.sh

shouldn't touch this.

fixes:
* previous implementation doesn't support multi-open/truncate by different
  users on the same inode.
* update DLD.
* cleanup.

fix bug 7348, when chmod, should recompute mac

revert back ptldebug after merge.

land ost add/del to HEAD

1) add mks type in sanity-crypto.sh
2) fix decrypt problem in mks type

 - open file by fid in REPLAY|RESENT case because parent can disapper by
   that time

- changes in test45.sh

- fixes for making liblustre at least buildable (including fixes to compilation bug found by Brian recently)

some fixes about crypto api
1)some fixes about init inode key
2)some fixes about compute new mac

  ../../lustre/include/linux/lustre_sec.h:541: error: field `c_hash' has incomplete type

some fixes about crypto api
1)some debug info fix
2)reorganize the code for mds_set_gskey

some minor fixes about sanity-crypto test scripts

- remove unneeded debug

land crypto api

  5984 - oops in mdc_set_lock_data
         we must drop lookup lock in ll_clear_inode()
  7216 - abort due to missed clients
	 replay already committed (open/close rpcs) requests
	 even if some clients haven't connected in time and
	 got evicted
  7057 - sanity: test_66: /mnt/lustre/f66 blocks 0 < 8
         send close rpc only when all dirty pages are written
	 (otherwise i_blocks isn't valid)
  6817 - don't update attrs. on mds if the client hasn't modified file
         using openhandle being closed

r=6327

- fixes in lmc

fix a typo in sanity-cmobd.sh

  mds_open() doesn't take lookup lock and client can't maintain
  dcache in coherence

are used in numerical comparisons.

This is needed to prevent errors such as:
  mds blocked setgid attempt (1000/1000 -> 100)