[Varnish] #171: Support logging ip and port of varnishd instance

[Varnish]

#171: Support logging ip and port of varnishd instance
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 Reporter:  Caleb        |        Owner:  phk  
     Type:  enhancement  |       Status:  new  
 Priority:  normal       |    Milestone:       
Component:  varnishd     |      Version:  trunk
 Severity:  normal       |   Resolution:       
 Keywords:               |  
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Comment (by phk):

 I have added the listen address to the SessionOpen record, since we have
 that for free.

 Putting the actual bound IP(+port) there would cost us a (cheap) system
 call, so I would prefer to avoid it by default, but we can make it an
 option controlled by a parameter.

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Ticket URL: <http://varnish.projects.linpro.no/ticket/171#comment:1>
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