1. Work on the query some more.  Make the various clauses that matched node
   types more precise.  Previously for example, plab dslices were potentially
   matching the vnode clause because the latter only check that something was
   a virtnode, which plabdslices are.
2. Watchout for 0 timeout values which are supposed to mean no timeout
   (but would have meant immediate timeout here)
3. Dink with the logging.