[tor-bugs] #10697 [Tor Weather]: Fetch hourly lists from Onionoo with relay status

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#10697: Fetch hourly lists from Onionoo with relay status
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 Reporter:  baumanno                  |          Owner:  kaner
     Type:  task                      |         Status:  new
 Priority:  normal                    |      Milestone:
Component:  Tor Weather               |        Version:
 Keywords:  weather, rewrite, hourly  |  Actual Points:
Parent ID:                            |         Points:
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 From the Tor Weather (Rewrite) wiki page wiki:doc/weather-in-2014:

 {{{
 Once per hour, download a list from Onionoo that contains relays that have
 been running in the last week. Check if there are any relays that have
 been offline for long enough to notify a subscribed user. Send out emails.
 }}}

 For now, we will concentrate on this subset:
 - query Onionoo for a list of relays containing the appropriate
 information
 - keep this query as lightweight as possible
 - considering the current weather-design, work out which relays qualify
 for a 'NodeDown' event
 - output identifier (this could be the contact data directly from the
 relay, or, to patch this into current weather sometime, the fingerprint)
 - do this hourly

 Email notifications will be left out for this initial phase.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/10697>
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