[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        |     Resolution:
 Keywords:  prop140       |  Actual Points:
Parent ID:  #13339        |         Points:  2
 Reviewer:                |        Sponsor:  Sponsor4
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Comment (by nickm):

 I made a tiny bit of progress towards this in a `dircache` branch.
 (noting that here so  I don't lose it)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21647#comment:3>
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