[Varnish] #807: varnishlog should do input validation

[Varnish]

#807: varnishlog should do input validation
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 Reporter:  tfheen      |       Owner:  phk  
     Type:  defect      |      Status:  new  
 Priority:  normal      |   Milestone:       
Component:  varnishlog  |     Version:  trunk
 Severity:  normal      |    Keywords:       
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 If varnishlog is run with -r and passed a compressed (or non-varnishlog)
 file, it will happily output garbage.  We should make sure what we read at
 least resembles a valid varnishlog file.

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Ticket URL: <http://www.varnish-cache.org/trac/ticket/807>
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