[tor-bugs] #19988 [Core Tor/Tor]: Warn when Port addresses have no effect

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#19988: Warn when Port addresses have no effect
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     Reporter:  teor          |      Owner:
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: 0.2.???
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:
       Points:  1             |   Reviewer:
      Sponsor:                |
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 Following up #13953, we could also warn:
 "Setting Listen Address %s on the %sNoListen port %d has no effect. Tor
 uses Address for IPv4 and the first advertised port for IPv6.",
 address_string, ip_version == 6 ? "secondary " : "", port_number

 We would warn on every IPv4 NoListen port, and the second and subsequent
 IPv6 NoListen ports.

 I think this could be useful, but it could also be too verbose.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19988>
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