ServerTransportPlugin sets or_port to '127.0.0.1:0'

When Tor is configured with

ORPort "[::]:9001" so on default linux it is configured to listen on both v4 and v6 sockets.

and obfsproxy configured to run in managed mode:

ServerTransportPlugin obfs2 exec /usr/local/bin/obfsproxy --log-min-severity=debug --no-safe-logging --logfile=/var/log/tor/obfsproxy.log --managed

we get:

Proxy environment: [...] or_port: '127.0.0.1:0' [...]

If we add a v4 only OrPort OrPort "0.0.0.0:9001" it works as expected:

[...] or_port: '127.0.0.1:9001' [...]

Trac:
Username: murble