[tor-relays] Opt-In Trial: Fallback Directory Mirrors

[starlight.2015q3 at binnacle.cx]

follow up:

Looking at the URL it appears that the selection criteria indicates which 
records to select NOT the range of history to return.  So the having the script filter by MAX_AGE (per the patch) is correct.  A quick examination of

https://onionoo.torproject.org/protocol.html

reveals no obvious way to restrict the history time-range returned.