+ >>> I had to use it a bit more, as a replacement for `$config{url}`
+ >>> when doing things like referencing stylesheets or redirecting to
+ >>> the top of the wiki.
+ >>>
+ >>> I ended up redoing this without the extra parameter. Previously,
+ >>> `baseurl(undef)` was the absolute URL; now, `baseurl(undef)` is
+ >>> the local path. I know you objected to me using `baseurl()` in
+ >>> an earlier branch, because `baseurl().$x` looks confusingly
+ >>> similar to `baseurl($x)` but has totally different semantics;
+ >>> I've generally written it `baseurl(undef)` now, to be more
+ >>> explicit. --[[smcv]]
+