Important notes.
===============
1. This  implementation  is  actually  a  system  independent
   template.  It  means  that  the question  "Where  and  how
   may  I collect the monitored statistics ?"  is  taken  out
   from the scope. Actually, it is emulated with random values.
   You are free  to  rewrite  the function 'get_history_data'
   for your system.  Don't  forget  also to insert DataSourse
   checking in 'history_Validate'  function.  (Both  functions
   are in the file history.c).

2. This implementation has two RMON mib understanding extensions
   (I hope it does not break anything; nevertheless you may  use
   it in completely standard way).

   2.1. I permit to set VALID entryStatus when entry doesn't exit;
        in this case PDU has to have  the  necessary & valid  set
        of non-default values

   2.2. I permit to travel from VALID to 'UNDER_CREATION' state:
        these ways a manager can change control entry and validate
        it once more.


THANKS
======
  Mr. Michael J. Slifcak of Internet Security Systems, Inc has provided
  a number of remarks, I implemented ALL of them.