Log Message:
Update drraw to 2.2a4.

  Changes since 2.2a3 [2007/03/17]:
  - Fixed support for SHIFT graph command.
  - Updated RRDs::fetch usage again (courtesy of Andy Mayhew).
  - Saving dashboards could generate bad index entries (reported by Fabien
    Wernli).
  - Added "Invisible" color (suggested by John Rouillard).
  - Dashboard style display for templates broke custom time display of
    templates (reported by Mark Noworolski).
  - Two typos caused forms to use POST instead of GET (courtesy of Fabien
    Wernli).
  - The graph editor no longer allowed stacking CDEFs or VDEFs (reported by
    John Rouillard).