[tor-bugs] #25586 [Core Tor/Torsocks]: gethostbyaddr_r doesn't populate h_addrtype field of output hostent struct

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#25586: gethostbyaddr_r doesn't populate h_addrtype field of output hostent struct
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     Reporter:  exarkun            |      Owner:  dgoulet
         Type:  defect             |     Status:  new
     Priority:  Medium             |  Milestone:
    Component:  Core Tor/Torsocks  |    Version:
     Severity:  Normal             |   Keywords:
Actual Points:                     |  Parent ID:
       Points:                     |   Reviewer:
      Sponsor:                     |
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 The glibc implementation of gethostbyaddr_r will set h_addrtype to the
 address family that was passed in as an argument.  Some programs depend on
 this (CPython is the one I noticed) for correct operation.

 The current behavior leaves the field unchanged and likely provides an
 undefined value to the caller.  In the case of CPython, this results in
 `socket.gethostbyaddr` always raising EAFNOSUPPORT.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25586>
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