Add support for conditional domain suffices in HOSTNAMEFQDN mode

[DL6ER]

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Add support for conditional domain suffices in HOSTNAMEFQDN mode. Fixes #1247

[regae]

i can confirm, my issue has been fixed with this PR.
thank you

[yubiuser]

Just for me to understand:

Given a dnsmasq config like

domain=lan,192.168.55.0/24,local
domain=guest,192.168.66.0/24,local
domain=iot,192.168.77.0/24,local

And setting PIHOLE_PTR=HOSTNAMEFQDN, FTL will now reply to PTR requests arriving from 192.168.55.0 with HOSTNAME.lan and from 192.168.66.0 with HOSTNAME.guest and so on?

[DL6ER]

Yes, exactly. You could even specify an exact address like

domain=lan,192.168.55.0/24
domain=other,192.168.55.2

so all devices in the range 192.168.55.0/24 will become hostname.lan, except for 192.168.55.2 which would become hostname.other

[pralor-bot]

This pull request has been mentioned on Pi-hole Userspace. There might be relevant details there:

https://discourse.pi-hole.net/t/pi-hole-ftl-v5-12-web-v5-9-and-core-v5-7-released/51795/1