Log Message:
Update to graphviz version 2.2

This should take care of PR pkg/28596.

Changes since last packaged version (2.0)
January 19 2005
        - release 2.2
        - fix bugs: 86, 345, 517, 579, 580, 597, 600, 601, 604
        - use the original cpl1.0.txt as the license master, instead of CPL.html
        - fix for bug generating in memory bitmaps that was affecting webdot
        - fixes for windows builds
        - documenttion updates