* The full text indexer now runs in its own dedicated thread instead of

* The full text indexer now runs in its own dedicated thread instead of
  in the housekeeping thread.  The main indexer loop now also has the ability
  to save its place and bail out early when it discovers that the server is
  trying to shut down.  The main server loop will pthread_join() the indexer
  thread and patiently wait for it to complete before exiting.  These changes
  all put together mean that citserver will not hang when it is terminated
  during an indexing operation.