[tor-bugs] #18318 [Tor]: Make sure keys and IP:Ports are unique in a consensus

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#18318: Make sure keys and IP:Ports are unique in a consensus
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 Reporter:  teor               |          Owner:
     Type:  defect             |         Status:  new
 Priority:  Very High          |      Milestone:  Tor: 0.2.7.x-final
Component:  Tor                |        Version:
 Severity:  Blocker            |     Resolution:
 Keywords:  TorCoreTeam201602  |  Actual Points:
Parent ID:  #17668             |         Points:
  Sponsor:                     |
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Comment (by teor):

 This resolves this part of #17668:

 When a relay changes its RSA key, we'll include it in our vote twice. If
 both RSA keys map to the same ed25519 key, this bug triggers. So far we
 just never noticed that this is happening because we never cared that two
 things are on the same IP:port combination.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18318#comment:1>
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