cli/queries: start fewer goroutines at once
cli/queries: start fewer goroutines at once

- By blocking on <-pool in the goroutine, we were starting more goroutines
  than we may ultimately need, since the first error cancels the filter.
- Now we block before creating the goroutine at all.

opentable/sous,samsalisbury/sous,opentable/sous,samsalisbury/sous,samsalisbury/sous,samsalisbury/sous,opentable/sous,samsalisbury/sous,opentable/sous,opentable/sous