add Charset=utf-8 to IndexOptions

[peterdd]

as it sends this http header

Content-Type: text/html;charset=ISO-8859-1

on my server by default, but filesystem supports utf-8 names.

After adding Charset=utf-8 the server spits this http header:

Content-Type: text/html;charset=utf-8

The metatag

<meta charset="utf-8">

in header.html is ignored by browser in favor of http header value.

[DionPotkamp]

Without changing anything: