10-dir-listing.conf

dir-listing.encoding = "utf-8"
server.dir-listing   = "enable"

gistfile1.txt

blaine@playground:/var/www$ ls -l
total 12
drwxr-xr-x 2 www-data www-data 4096 Jan 23 02:11 ftp
-rw-r--r-- 1 root     root     3585 Jan 23 01:28 index.lighttpd.html
drwxr-xr-x 2 www-data www-data 4096 Jan 23 01:47 public

lighttpd.conf

$HTTP["url"] =~ "^/ftp/" {
        server.document-root = "/var/www/ftp"
        dir-listing.activate = "enable"
}