[tor-bugs] #22304 [Core Tor/Tor]: Support generating HS private key / onion address without publishing

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#22304: Support generating HS private key / onion address without publishing
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     Reporter:  segfault      |      Owner:
         Type:  enhancement   |     Status:  new
     Priority:  Medium        |  Milestone:
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:  AffectsTails
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
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 While developing Tails Server, we encountered the need to know the onion
 address of a service before making it available via Tor. It would be
 awesome if this could be achieved via the control port, e.g. with a
 `DontPublish` flag to `ADD_ONION`.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22304>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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