after upgrading from Debian Stretch to Buster, my Lighttpd failed to start.
A new mime-assign script with a different name has been installed after upgrading.
The former /usr/share/lighttpd/create-mime.assign.pl has been removed and a newer /usr/share/lighttpd/create-mime.conf.pl has been installed.
Edit the line in /etc/lighttpd/lighttpd.conf
and replace the former with the newer script