To enable dnsmasq, edit %%PREFIX%%/etc/dnsmasq.conf and
set dnsmasq_enable="YES" in /etc/rc.conf[.local]

Further options and actions are documented inside
%%PREFIX%%/etc/rc.d/dnsmasq

SECURITY RECOMMENDATION
~~~~~~~~~~~~~~~~~~~~~~~
It is recommended to enable the wpad-related options
at the end of the configuration file (you may need to
copy them from the example file to yours) to fix
CERT Vulnerability VU#598349.