Reload should (offer a possibility to) load the index.html in subdirectories

[Doogiemuc]

When serving some static html files with reload with the following simple directory structure:

  index.html
  /subdir
    index.html    // <= in subdir

When index.html contains a link <a href="/subdir/"> then this link currently does not work. Reload does not load index.html by default.

There should at least be an option to enable this.

[alallier]

PRs welcome