[Varnish] #793: TTL randomizing

[Varnish]

#793: TTL randomizing
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 Reporter:  tmagnien                  |        Owner:  phk   
     Type:  enhancement               |       Status:  closed
 Priority:  normal                    |    Milestone:        
Component:  varnishd                  |      Version:  trunk 
 Severity:  normal                    |   Resolution:  fixed 
 Keywords:  expiry randomization ttl  |  
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Changes (by phk):

  * status:  new => closed
  * resolution:  => fixed


Comment:

 (In [5421]) Add REAL std.random(REAL low, REAL high) with associated
 testcase.

 Example usage:

     sub vcl_fetch {
         /* Spread TTLs -10%..+5% because CMS timestamps whole minutes */
         set beresp.ttl = beresp.ttl * random(0.90, 1.05);
     }

 This usage was one of the very first VCL examples we ever wrote on
 a whiteboard, we just never got a round tuit until now.

 Fixes: #793

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Ticket URL: </ticket/793#comment:1>
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