[tor-bugs] #21757 [Core Tor/Tor]: Using Pluggable Transports on tor master is broken

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#21757: Using Pluggable Transports on tor master is broken
------------------------------+--------------------------------
     Reporter:  gk            |      Owner:
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: 0.3.1.x-final
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
------------------------------+--------------------------------
 While testing a patch for #21753 I realized that PTs in general are
 currently broken with tor master resulting into output like
 {{{
 CMETHOD obfs2 socks5 127.0.0.1:41925
 CMETHOD obfs3 socks5 127.0.0.1:41299
 CMETHOD obfs4 socks5 127.0.0.1:34025
 CMETHOD scramblesuit socks5 127.0.0.1:35225
 CMETHODS DONE'. We only support version '1'
 Mar 16 13:03:05.000 [warn] Managed proxy at
 './TorBrowser/Tor/PluggableTransports/obfs4proxy' failed the configuration
 protocol and will be destroyed.
 }}}
 if started from Tor Browser.

 Bisecting reveals that this got introduced with
 6e78ede73f190f3aaf91623a131a20cf031aad7e which fixed #21654.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21757>
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