[tor-bugs] #33136 [Applications/Tor Browser]: Setting TOR_TRANSPROXY=0 is the same as TOR_TRANSPROXY=1

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#33136: Setting TOR_TRANSPROXY=0 is the same as TOR_TRANSPROXY=1
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     Reporter:  boklm                     |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Low                       |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Minor                     |   Keywords:
                                          |  TorBrowserTeamTriaged
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 It looks like the torbutton code that is using the `TOR_TRANSPROXY`
 environment variable is only checking if the variable exists, without
 looking at its content. So setting the environment variable to `0` or
 empty still enables it, which can be confusing.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33136>
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