[tor-bugs] #20591 [Core Tor/Tor]: Ensure relays don't make multiple connections during bootstrap

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#20591: Ensure relays don't make multiple connections during bootstrap
-----------------------------+---------------------------------------------
     Reporter:  teor         |      Owner:
         Type:  defect       |     Status:  new
     Priority:  Medium       |  Milestone:  Tor: 0.2.9.x-final
    Component:  Core         |    Version:  Tor: 0.2.8.1-alpha
  Tor/Tor                    |
     Severity:  Normal       |   Keywords:  029-proposed, CoreTorTeam201611
Actual Points:               |  Parent ID:  #20499
       Points:  0.1          |   Reviewer:
      Sponsor:               |
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 In update_consensus_networkstatus_downloads, relays use
 `ClientBootstrapConsensusMaxInProgressTries` as the maximum number of in-
 progress attempts, even though this value should only be used for clients.

 (However, relays do not deliberately launch multiple attempts, so the
 impact of this bug should be minimal. Still, we should fix this to defend
 against bugs like #20499.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20591>
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