The upstream web site is still up, but there does not seem to be a way to submit bug reports and patches. The mailing list has been shut down. This is why I'm filing this bug for referencing purposes.
Created attachment 1926935 [details] thttpd-c99.patch
Is lighthttpd a replacement? How does it compare in size, simplicity, features? If upstream is down, and there is a suitable replacement, maybe it should be dropped. Any other minimal httpd packages in Fedora?