Disabling pihole for some clients(with new group feature)

[yubiuser]

@Raspberry55055

Or just make CIDR less important than exact adresses.

Will be fixed in v5.1

Subnetting is not working with most relevant entry

This will ensure we will use the most recent + make the choice deterministic even in case of duplicates https://github.com/pi-hole/FTL/pull/753 @yubiuser Check out the web interface screeshot in this PR to see what I meant with "something more in the pipeline".