tive file URL starts with anything but a slash, and doesn't have
          the <span class="codefrag">file:</span> prefix, for example <span class="codefrag">file.ext</span>,
          <span class="codefrag">path/file.ext</span> or <span class="codefrag">../file.ext</span>. The string
          <span class="codefrag">file:path/file.ext</span> is <em>not</em> a relative URL,
          in fact, it isn't a valid URL at all. A relative URL is subject to a
          resolving process, which transforms it into an