/*****************************************************************************
- * RRDtool 1.3rc6 Copyright by Tobi Oetiker, 1997-2008
+ * RRDtool 1.3rc7 Copyright by Tobi Oetiker, 1997-2008
* This code is stolen from rateup (mrtg-2.x) by Dave Rand
*****************************************************************************
* diff calculate the difference between two very long integers available as