anchor.diff:  power of Lua is utilized, which allows customizing how rules are written
   by defining wrapper functions around the default `Rule()` function.
   
  ------------------------------------------------------------
  +----
   --[[ ----------------------------------------------------
   ---- Define a function to reduce verbosity:
   ---- RequestRegex(id, regex [,severity [,confidence]])
  
positive.code: 
  # Define a "lua/3" rule that will run only if "lua/2" matches
  Rule("lua/3",1):follows("lua/2")
  -------------------------------------------------------------
  
  The following is defined for use in defining rules within Lua.
  
  
negative.code: files. In the future IronBee will provide a utility for this, but for
  now the expiration date is encoded in the filename.
  
  ----
  # Format: uuid/expiration-tempname
  0de114da-8ada-55ad-a6de-e68a1263412a/001364624257-0004d91e578bc99f.json.dXFR9d
  ----
  
  Periodic purging could be accomplished with a cron job to check that the
  current epoch based date is greater than that encoded in the file.
  
  ----
  #!/bin/sh
  
  # Specify the persist-fs: base directory
  