Update b_eq from HEAD (20040213_1644) (b_bug974 landing).

Update b_eq from HEAD (20040213_1644) (b_bug974 landing).

Eric Mei, per your comment in osc_announce_cached(), we should only be sending
OBD_MD_FLGRANT if the client is caching data.  If (AFAIK) liblustre isn't
doing any client-side write cache then it shouldn't be requesting any grant
from the OST.  This isn't critical, since the OST _should_ stop giving out
grant when the client isn't consuming it, but it would be good to verify.