[tor-bugs] #20655 [Core Tor/Tor]: Run the chutney "mixed" network tests in multiple ways

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#20655: Run the chutney "mixed" network tests in multiple ways
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     Reporter:  nickm         |      Owner:
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: 0.2.???
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
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 While working on ed25519 handshake thigns, I found that the "mixed"
 chutney network test was often inadequate for my needs:

    * I wanted to try testing with clients and relays that are very old,
 while keeping the authorities up-to-date.
    * I wanted `make test-network-all` to run the "mixed" test multiple
 times, with multiple older Tor instances.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20655>
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