OpenWrt 21.02 i386_pentium-mmx repository for dnsdist
To install the dnsdist package, run
echo "src/gz pdns https://repo.powerdns.com/openwrt/OpenWrt_21.02/i386_pentium-mmx/dnsdist" >> /etc/opkg/customfeeds.conf
opkg update
opkg install dnsdist # or dnsdist-full if you need all the features