Merge b1_5 from b1_4 (20060711_1245)

Merge b1_5 from b1_4 (20060711_1245)

Bugzilla   : 4778
Description: last_id value checked outside lock on OST caused LASSERT failure
Details    : If there were multiple MDS->OST object precreate requests in
	     flight, it was possible that the OST's last object id was checked
	     outside a lock and incorrectly tripped an assertion.  Move checks
	     inside locks, and discard old precreate requests.

Bugzilla   : 9387
Description: import connection selection may be incorrect if timer wraps
Details    : Using a 32-bit jiffies timer with HZ=1000 may cause backup
	     import connections to be ignored if the 32-bit jiffies counter
	     wraps.  Use a 64-bit jiffies counter.

Bugzilla   : 10083
Description: LNET request buffers exhausted under heavy short-term load
Details    : If a large number of client requests are generated on a service
	     that has previously never seen so many requests it is possible
	     that the request buffer growth cannot keep up with the spike in
	     demand.  Instead of dropping incoming requests, they are held in
	     the LND until the RPC service can accept more requests.

Bugzilla   : 9314
Description: Assertion failure in ll_local_open after replay.
Details    : If replay happened on an open request reply before we were able
             to set replay handler, reply will become not swabbed tripping the
             assertion in ll_local_open. Now we set the handler right after
             recognising of open request