[tor-bugs] #20552 [Core Tor/Tor]: Advertise support for ed25519 link handshake using subprotocol versions

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#20552: Advertise support for ed25519 link handshake using subprotocol versions
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     Reporter:  nickm         |      Owner:
         Type:  enhancement   |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: 0.3.0.x-final
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:  #15054
       Points:                |   Reviewer:
      Sponsor:                |
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 Now that #15055 is merged, #15056 will want to know which relays support
 its link protocol extensions.  But to do that, we'll need to expose the
 fact in descriptors.  The canonical way to do that is now with subprotocol
 versions (see prop#264).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20552>
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