[Varnish] #1470: Ban lurker would spin on busy objects

[Varnish]

#1470: Ban lurker would spin on busy objects
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 Reporter:  martin    |      Owner:
     Type:  defect    |     Status:  new
 Priority:  normal    |  Milestone:
Component:  varnishd  |    Version:  3.0.5
 Severity:  normal    |   Keywords:
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 The pass bits of the oc's flags isn't cleared before or'ing the new
 pass on failing the busy object test in the ban lurker. This would
 cause the pass not to be matched later, making the lurker spin on the
 busy object. When the busy flag was cleared, things would resume to
 normal.

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Ticket URL: <https://www.varnish-cache.org/trac/ticket/1470>
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