IPv6 and CIDR netmask support for List of networks that are allowed without auth

Currently, “List of networks that are allowed without auth” seems to support neither CIDR notation:

192.168.1.0/24

nor any variants of IPv6 address specs, including:

1111:2222:3333:4444::/64
1111:2222:3333:4444:0000:0000:0000:0000/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff

I’d like to see all these options available and functional.

Early 2021 clean-up: duplicate