[tor-bugs] #22413 [Core Tor/Tor]: build fails with libzstd-0.5.1

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#22413: build fails with libzstd-0.5.1
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     Reporter:  catalyst      |      Owner:
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: 0.3.1.x-final
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
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 Ubuntu 16.04 (amd64 in my case) has libzstd-dev 0.5.1-1.  It looks like
 master uses some libzstd symbols that are newer than that.  See attached
 logs.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22413>
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