avoid _wsgioutputfile <-> _wsgirequest circular reference We use the _wsgirequest object itself as the output file object. To avoid a "self.out = self" which would create another circular reference, we make the "out" attribute a trivial property.

avoid wsgiapplication <-> MercurialHTTPServer circular reference

hgwebdir: break templater -> templater circular reference This is essentially another instance of the same problem fixed by the parent changeset. See its commit message for the details.