[tor-bugs] #1963 [Tor Relay]: Make tor-fw-helper summarize success status

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#1963: Make tor-fw-helper summarize success status
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 Reporter:  sjmurdoch  |       Owner:       
     Type:  task       |      Status:  new  
 Priority:  normal     |   Milestone:       
Component:  Tor Relay  |     Version:       
 Keywords:             |      Parent:  #1900
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 When tor-fw-helper runs, it outputs various status information to stdout,
 but it is hard to tell, given this, whether it actually succeeded in
 punching a hole in the firewall.

 I think the right place to put this logic would be in tor-fw-helper, in
 such a way that Tor can parse this and output a suitable log message.

 Port forwarding should be considered to have succeeded if '''either'''
 UPnP or NAT-PMP succeeded.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/1963>
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