- add set_info calls, to inform the filter when the MDS connects

- add set_info calls, to inform the filter when the MDS connects
- make OST_LOG_CANCEL into a more generic OBD_LOG_CANCEL packet
- the filter can't use the normal obd methods unless we also give it an MDC
- lov_connect now initializes the export lists unconditionally
- the filter needs to register for the commit callback if there are
  cookies to be cancelled, regardless of whether this is a failover OST
- hacked around in the lprocfs sewer until it built again