pkgsrc changes:

- update to 2.20.3

Upstream changes:

October 7, 2008
        - Release 2.20.1
        - Security fix for stack overflow problem in the graph parser reported by IBM
June 25, 2008
        - Release 2.20.2
        - Fix bug in HTML-like labels
June 23, 2008
        - Release 2.20.1
        - Fix bug in ccomps related to conversion to cgraph
June 20, 2008
        - Release 2.20.0
        - Preparing for Release 2.20
        - Fixed bugs: 1315, 1317, 1324, 1336, 1343, 1364
        - Add new "folder" shape for nodes.
        - Migration of gvpr tools to libcgraph.
        - New output format -Teps  (encapsulated postscript)
        - Various NetBSD and SuSE fixes incorporated
        - ./configure now provides a summary
        - RPM specfile updates for fedora-10 (no more string comparisons)
        - Add MacOS support (Glen Low)
March 10, 2008
        - Release 2.18
        - Fixed bugs: 1249, 1255, 1256, 1268, 1276, 1289, 1295, 1300,
                Fedora BZ#247376,
        - in -Tps use a new number formatter that suppresses trailing 0.
        - support tcl/tk-8.5
        - support gcc-4.3
        - support for node usershapes/images in svg format (thanks Alex Poylisher)
        - install: perl, php, python, ruby, tcl, bindings in language-specified directories
        - add arrowhead scaling with edge penwidth
        - add "folder" node shape (thanks Pander)
        - many windows and mac fixes (thanks Glen)
        - add "smyna" large graph view (thanks Arif) (not yet included in binary distros)

(sno)