[tor-bugs] #25614 [Core Tor/Tor]: tor sets `TOR_PT_EXIT_ON_STDIN_CLOSE=1` only for server transports, not client transports

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#25614: tor sets `TOR_PT_EXIT_ON_STDIN_CLOSE=1` only for server transports, not
client transports
------------------------------+------------------------------
     Reporter:  dcf           |      Owner:  (none)
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: unspecified
    Component:  Core Tor/Tor  |    Version:
     Severity:  Minor         |   Keywords:
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
------------------------------+------------------------------
 At comment:2:ticket:24642, we were surprised to find that server
 transports get `TOR_PT_EXIT_ON_STDIN_CLOSE=1` set, and client transports
 do not.

 https://gitweb.torproject.org/tor.git/tree/src/or/transports.c?id=9e8b762fcecfece64aae70ae640aaa59fd227ca5#n1387

 We expected that it would be set for both. Client PTs have code to deal
 with `TOR_PT_EXIT_ON_STDIN_CLOSE`, which it turns out has been going
 unused.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25614>
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