[Varnish] #1480: Porting guide for 4.0.0 is incomplete

[Varnish]

#1480: Porting guide for 4.0.0 is incomplete
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 Reporter:  falconindy  |       Type:  documentation
   Status:  new         |   Priority:  normal
Milestone:              |  Component:  website
  Version:  trunk       |   Severity:  normal
 Keywords:              |
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 Thanks for the new release of Varnish. I found the porting guide for
 4.0.0, but it seems incomplete in a number of ways. My setup is quite
 simple, yet I still ran into 2 instances where the guide did not cover
 important changes:

 - vcl_error is now vcl_backend_error
 - req.request is now req.method

 There may be other instances -- I see there's also now a
 vcl_backend_fetch, but I can't determine if this is new, or just renamed.

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Ticket URL: <https://www.varnish-cache.org/trac/ticket/1480>
Varnish <https://varnish-cache.org/>
The Varnish HTTP Accelerator