[Dillo-dev] Dillo reporting UTF-8 bytes in URLs as bugs

On my personal website <https://256-32.com/>, Dillo reports the following bug in a link that uses special characters: HTML warning: line 64, URL has 8 illegal bytes in {00-1F, 7F-FF} range ('/computers/důvěřivý'). However, the HTTP response sent by my server specifies charset=utf-8 in the content type. These UTF-8 links work properly in Dillo, despite the bug message, and I believe my site is not in error here. <validator.w3.org> says my site is fine, so it seems there's nothing wrong with special characters in URLs. It doesn't report the same bytes outside of a link href as being bad. The error message seems to originate from src/html.cc:196.