[tor-bugs] #16582 [Tor]: Distinguish ENOENT from other error cases when loading keys.

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#16582: Distinguish ENOENT from other error cases when loading keys.
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     Reporter:  nickm   |      Owner:
         Type:  defect  |     Status:  needs_review
     Priority:  major   |  Milestone:  Tor: 0.2.7.x-final
    Component:  Tor     |    Version:
   Resolution:          |   Keywords:
Actual Points:          |  Parent ID:  #16530
       Points:          |
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Comment (by nickm):

 teor: I'm mainly concerned with ed25519 keys here; I believe they don't
 use file_status.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16582#comment:3>
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