* Fix interrupt-pending-when-timeout-occurs handling in l_wait_event.

* Fix interrupt-pending-when-timeout-occurs handling in l_wait_event.
* If timeout specified, but no handler, wake up with -ETIMEOUT instead of
  going back to sleep.
* Export a class_signal_client_failure hook-symbol from obdclass, to be filled
  in by recovd.o and used by various obdclass bits (avoiding sour dependencies
  on recovd.o).
* Add OBD_FAIL_OST_BRW_{READ,WRITE}_BULK fail_loc values, for testing of
  bulk-xfer timeouts and interrupts.
* Fix the timeout in ll_sync_io_cb to scale by HZ.
* Rip out some leftovers from ptlrpc_check_reply.