Minor: Adding a query string on a URI causes display of a non-existent container

[jeff-zucker]

If you put a query string on the end of a URL that doesn't handle queries, the databrowser displays the query string as if it were a container. For example https://jeffzucker.inrupt.net/public/?foobar shows a folder named "?foobar" with the contents of the /public/ folder. In some cases there is infinite recursion of the non-existent folder, for example https://timbl.solid.community/public/?foobar.
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