r=alex

 - limit number of in-flight async destroy rpcs MDS issues
   to destroy OST objects

code checked out prior to all of these changes.

  path of LOV EA revalidation

- yank granted update locks in the same case in order to invalidate
  cached size/blocks attributes on clients

Possible fix for file size mismatch between mds and osts.

remove debug patch for test41

try tmp patch for failed test41

r=alex (original patch by don milos)

 - revalide i_size/i_blocks along with LOV EA in case of OSS removal

- regression test for the case

drop truncate capa after ll_truncate.

more debug message.

message cleanup.

  1) ll_file_open() has a request with capa
  2) the inode is already opened, so we close just received openhandle
  3) mds fails, recovers, ptlrpcd replays open request
  4) ll_set_capa() finds capa in replayed open request non-swabbed - BUG

put capa before calling ll_renew_capa, in case it might get updated.

- minor cleanups

don't make too much noise.

export symbol.

make noise when capa not found.

  mds_handle() will oops.

  - mds_getattr() returns regular errors in rq_status
  - mdc_interpret_getattr() interprets it properly

client capa list is sorted.
new capa for mds and oss should be added at the end. (so it should be sorted too)

have difference in expiry time.

  permissions

cleanup debug message.