[tor-bugs] #20539 [Core Tor/Tor]: Make sure fallback directories aren't running buggy versions / can deliver a recent consensus

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#20539: Make sure fallback directories aren't running buggy versions / can deliver
a recent consensus
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 Reporter:  teor          |          Owner:
     Type:  defect        |         Status:  needs_revision
 Priority:  Medium        |      Milestone:  Tor: 0.3.0.x-final
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:  fallback      |  Actual Points:
Parent ID:  #18828        |         Points:  0.5
 Reviewer:                |        Sponsor:
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Comment (by teor):

 (We'll make the fallback CONSENSUS_EXPIRY_TOLERANCE lower in #20942, after
 #20909 is fixed.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20539#comment:10>
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