Minimal OpenWrt 19.07.3 for D-Link DIR-300(B5)/DIR-600(B5)/DIR-610(A1)
No factory flash! Flash via serial ramboot, recovery interface or existing OpenWrt installation.

Removed packages:
* PPPoE support (ppp, ppp-mod-pppoe)
* IPv6 support (ip6tables, odhcp6c, odhcpd-ipv6only)

If you want a minimal LUCI installation install the following packages:
uhttpd uhttpd-mod-ubus libiwinfo-lua luci-base luci-app-firewall luci-mod-admin-full luci-theme-bootstrap

Checksums:
373c1f148ac4fa64da4bf78e1855c12cee9d6c1d3621361a4bf08d56f868bec0  openwrt-ramips-rt305x-dir-610-a1-squashfs-factory.bin
d34404ca5f52e94d4a86f84ce616ea7d9c800bbf5062b6bf3ee35397888a4df8  openwrt-ramips-rt305x-dir-610-a1-squashfs-sysupgrade.bin