/*****************************************************************************
- * RRDtool 1.2rc5 Copyright by Tobi Oetiker, 1997-2005
+ * RRDtool 1.2.23 Copyright by Tobi Oetiker, 1997-2007
* This code is stolen from rateup (mrtg-2.x) by Dave Rand
*****************************************************************************
* diff calculate the difference between two very long integers available as