[Varnish] #1693: Hash is not logged even if Hash is set

[Varnish]

#1693: Hash is not logged even if Hash is set
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 Reporter:  fgsch   |      Owner:
     Type:  defect  |     Status:  new
 Priority:  normal  |  Milestone:
Component:  build   |    Version:  trunk
 Severity:  normal  |   Keywords:
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 Commit 7fd3aa3f8fdf97185af22ce9e71c338933ee1cc0 broke logging the hash.

 Test and fix attached.

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Ticket URL: <https://www.varnish-cache.org/trac/ticket/1693>
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