[htdig] formatting of $(METHOD), etc. for xhtml

[<ian...@di...>]

I'm trying to make my search results xhtml 1.0 compliant and one of the
errors is that the options tags aren't closed with '/>' Same thing for the
stars that go to the end of the document titles.

I looked at the templates and I see that these are generated by $(METHOD),
$(FORMAT), $(SORT) and $(STARSLEFT).

a) how/where do I edit these macros?
b) future versions may want to have an xhtml ./configure flag.

Thanks.