+2001/07/19 Alex van den Bogaerdt <alex@ergens.op.Het.Net>
+ VDEF support. This is a variable containing one value
+ and a time component. This type of variable can hold
+ the result of a function over a complete time series
+ of data (DEF or CDEF) such as the maximum seen, and when.
+
+2001/03/10 Jake Brutlag <jakeb@corp.webtv.net>
+ Support for COMPUTE data sources (CDEF data sources). Removes the RPN
+ parser and calculator from rrd_graph and puts then in a new file,
+ rrd_rpncalc.c. Changes to core files rrd_create and rrd_update. Some
+ clean-up of aberrant behavior stuff, including a bug fix.
+ Documentation update (rrdcreate.pod, rrdupdate.pod). Change xml format.
+
+2001/03/07 Tobias Oetiker <oetiker@ee.ethz.ch>
+ Integrated complete rewrite
+ of rrdgraph documentation by Alex van den Bogaerdt
+ <alex@ergens.op.Het.Net>. This also contains info on his planned
+ changes to the rrdgraph module
+
+2001/03/02 Tobias Oetiker <oetiker@ee.ethz.ch>
+ Added Aberrant Patch from Jake Brutlag <jakeb@microsoft.com>
+ From now one, new rrd files use version tag 0002. They can
+ NOT be read by the old 1.0.x rrdtools.
+
+ Jake: