[tor-bugs] #21647 [Core Tor/Tor]: Prop140: directory caches cache multiple past diffs or consensuses

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#21647: Prop140: directory caches cache multiple past diffs or consensuses
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     Reporter:  nickm         |      Owner:
         Type:  enhancement   |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: 0.3.1.x-final
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:  #13339
       Points:  2             |   Reviewer:
      Sponsor:  Sponsor4      |
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 To implement prop140, we need to store history about the consensus
 documents.  This should be fairly simple if we have  #21645 to work from.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21647>
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