[Varnish] #1612: Bug with Transfer-Encoding and zero-byte chunks (and keep-alive)

[Varnish]

#1612: Bug with Transfer-Encoding and zero-byte chunks (and keep-alive)
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 Reporter:  zviratko  |       Owner:
     Type:  defect    |      Status:  new
 Priority:  normal    |   Milestone:
Component:  varnishd  |     Version:  4.0.1
 Severity:  normal    |  Resolution:
 Keywords:            |
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Comment (by daghf):

 I'm able to reproduce this, when

 a. The request is handled as a pass, and
 b. the backend responds with an empty chunked response (just the 0 chunk),

 Varnish fails to specify a content-length or a transfer encoding in the
 response, thus breaking keep-alive.

 vtc test case attached.

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Ticket URL: <https://www.varnish-cache.org/trac/ticket/1612#comment:1>
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The Varnish HTTP Accelerator