clash between hnet-full and odhcpd-ipv6only

[timcoote]

If I upgrade to 19.07.4 (with: openwrt-19.07.4-mvebu-cortexa9-linksys_wrt3200acm-squashfs-sysupgrade.bin, and then use luci to refresh the available packages and then install hnet-full, I get the following errors:
`Collected errors:

• check_data_file_clashes: Package odhcpd wants to install file /etc/init.d/odhcpd
  But that file is already provided by package * odhcpd-ipv6only
• check_data_file_clashes: Package odhcpd wants to install file /usr/sbin/odhcpd
  But that file is already provided by package * odhcpd-ipv6only
• check_data_file_clashes: Package odhcpd wants to install file /usr/sbin/odhcpd-update
  But that file is already provided by package * odhcpd-ipv6only
• opkg_install_cmd: Cannot install package hnet-full.`

fwiw, I'm trying to follow Tore Anderson's instructions for setting up a Homenet router (https://bit.ly/369CyIK), which I have used on Chaos Calmer.

If I remove odhcpd-ipv6only and install hnet-full, odhcpd seems to crash after a few minutes (takes up 50% of the cpu and will not respond to, say, ubus call dhcp ipv4leases and the receive queues on ports 547 and 67 start to build up).

Is there a workaround/fix for the clash, and if there is am I likely to run into issues with dnsmasq providing dhcp, rather than odhcpd (as, I believe hnet was originally tested)?