[tor-bugs] #19758 [Core Tor/Tor]: Fix OpenBSD build bot errors

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#19758: Fix OpenBSD build bot errors
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     Reporter:  teor          |      Owner:
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: 0.2.???
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:
       Points:  0.5           |   Reviewer:
      Sponsor:                |
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 The OpenBSD build bot shows a lot of errors like
 https://buildbot.pixelminers.net/builders/OpenBSD/builds/1051
 (Needs a non-HSTS browser, the cert has expired.)

 There are a few warnings, some GCC pragmas that don't work, and evdns
 isn't linking correctly. So that might require help from the admin.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19758>
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