Subtle variation for security. If the mod_mime file has nothing specific
to say about a given set of file extentions (and has only based the
resolved fields on the default language, encoding and content type)
then tell us we can ignore the result by leaving the exception list
entirely undefined. If mod_mime adds anything (a language, charset, or
whatnot) then proceed to use the file in the Multiviews evaluation,
otherwise mod_negotation will ignore the file found.
This points out a need for a slightly twisted DefaultClientLanguage,
as opposed to creating foo.html.html files. Either that, or introduce
a 'neutral' entity that the user can list (say, .default) for mod_mime
to declare it as a fallback language/encoding/content-type/handler.
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@89919
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