[Varnish] #206: Improved VCL primitives for header manipulation

[Varnish]

#206: Improved VCL primitives for header manipulation
----------------------+-----------------------------------------------------
 Reporter:  des       |       Owner:  phk  
     Type:  defect    |      Status:  new  
 Priority:  normal    |   Milestone:       
Component:  varnishd  |     Version:  trunk
 Severity:  normal    |    Keywords:       
----------------------+-----------------------------------------------------
 At some point, we should add support in VCL for:

  * Directly examining, modifying or removing individual fields of multi-
 value headers, particularly {{{Cookie}}} and {{{Set-Cookie}}}; for
 instance:

 {{{
     if (req.http.Cookie[session_id]) {
         pass;
     }
 }}}

  * Iterating over a finite list, particularly:
   * all HTTP headers in a request, object or response
   * all fields in a multi-value header

-- 
Ticket URL: <http://varnish.projects.linpro.no/ticket/206>
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