[Seaside] Override docType in WAHtmlRoot object?

[Rick Flower]

I see in WAHtmlRoot the docType instance variable (and it's accessors as 
well), but am not sure how I can get to that object to change the 
default setting from Transitional to strict.. Is there some method off 
of WAComponent I can use to get to the WAHtmlRoot or some other way?

If it matters, I'm using the Canvas API..

Boris -- I think you've gone down this path already -- are there any 
gotcha's I should look out for?

TIA!