anchor.diff:  ** Day
   ** Month
   ** Year
  -* *headerLimit* (string) [optional] : HTTP response header that apiman will use to store the limit being applied. 
  +* *headerLimit* (string) [optional] : HTTP response header that apiman will use to store the limit being applied.
   * *headerRemaining* (string) [optional] : HTTP response header that apiman will use to store how many requests remain before the limit is reached.
   * *headerReset* (string) [optional] : HTTP response header that apiman will use to store the number of seconds until the limit is reset.
   
  
positive.code: ==== URL Rewriting Policy
  [[policy-url-rewriting]]
  ===== Description
  This policy is used to re-write responses from the back-end API such that they will be modified by 
  fixing up any incorrect URLs found with modified ones.  This is useful because apiman works through 
  an API Gateway, and in some cases an API might return URLs to followup action or data endpoints.  In
  these cases the back-end API will likely be configured to return a URL pointing to the unmanaged API
  endpoint.  This policy can fix up those URL references so that they point to the managed API endpoint
  
negative.code:       "extractRoles" : true,
        "roleQuery" : "SELECT r.rolename FROM roles r WHERE r.user = ?"
     }
  }
  ```
  
  ==== Authorization Policy
  [[policy-authorization]]
  