Thanks to Timo van Roermund for spotting this.
# The following DHCP options set up dnsmasq in the same way as is specified
# for the ISC dhcpcd in
-# http://www.samba.org/samba/ftp/docs/textdocs/DHCP-Server-Configuration.txt
+# https://web.archive.org/web/20040313070105/http://us1.samba.org/samba/ftp/docs/textdocs/DHCP-Server-Configuration.txt
# adapted for a typical dnsmasq installation where the host running
# dnsmasq is also the host running samba.
# you may want to uncomment some or all of them if you use