[Varnish] #1168: rollback breaks ESI

[Varnish]

#1168: rollback breaks ESI
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 Reporter:  scoof     |       Owner:       
     Type:  defect    |      Status:  new  
 Priority:  normal    |   Milestone:       
Component:  varnishd  |     Version:  3.0.0
 Severity:  normal    |    Keywords:       
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 When issuing a rollback on an ESI sub-request, req is rolled back to the
 initial request, thus making rollback unusable for ESI.
 vtc attached.

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Ticket URL: <https://www.varnish-cache.org/trac/ticket/1168>
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