[tor-bugs] #20939 [Core Tor/Tor]: Add average for each flag and uptime to the fallback summary

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#20939: Add average for each flag and uptime to the fallback summary
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     Reporter:  teor          |      Owner:
         Type:  enhancement   |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: 0.3.???
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:  fallback
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
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 When we generate a list of fallbacks, the script outputs a summary of the
 spread of IP blocks, ports, exit/non-exit, etc.

 It would be useful to have the average flags and uptime in this list as
 well.

 We could then do `success_without_auth = min(avg_uptime, avg_running,
 avg_v2dir)^3` and print it too.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20939>
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