queryall/queryall — pull request #27 by ansell (2012-05-02 06:57:05+00:00)
Title: Add HTTP 503 responses for cases where an endpoint was blacklisted causing no results

Note, this code only returns HTTP 503 responses in cases where at least one endpoint was blacklisted and there were no results. This makes sure that invalid queries are still 4xx based so that users do not keep trying to access queries that were completely unrecognised.