[tor-bugs] #33674 [Core Tor/Tor]: Check return value handling in the relay and dirauth stubs

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#33674: Check return value handling in the relay and dirauth stubs
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     Reporter:  teor          |      Owner:  teor
         Type:  task          |     Status:  assigned
     Priority:  Medium        |  Milestone:  Tor: 0.4.3.x-final
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:  043-must
Actual Points:                |  Parent ID:
       Points:  0.5           |   Reviewer:
      Sponsor:                |
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 In #33668, we discovered a relay module stub that didn't handle an `int
 *have_low_ports_out` return value correctly.

 We should check all the relay and dirauth module return values, including
 pointer out and inout return values.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33674>
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