[DL6ER]

What does this implement/fix?

Quad9 validates DNSSEC on all of its service endpoints now, including the unfiltered 9.9.9.10 set (see their service addresses page). The upstream list FTL hands to the web interface still labeled it "no DNSSEC".

The installer list and the docs carry the same label and are fixed in pi-hole/pi-hole#6740 and pi-hole/docs#1442.

How to test the change during review

1. dig @9.9.9.10 dnssec-failed.org returns SERVFAIL and dig @9.9.9.10 isc.org carries the ad flag. The same holds for 149.112.112.10, 2620:fe::10 and 2620:fe::fe:10.
2. Settings -> DNS lists "Quad9 (unfiltered, DNSSEC)".

The name is a display label only, nothing matches on it, so there is no test change.

Additional information

Related issue or feature (if applicable): Fixes #3280

Pull request in docs with documentation (if applicable): pi-hole/docs#1442

---

By submitting this pull request, I confirm the following:

1. I have read and understood the contributors guide, as well as this entire template. I understand which branch to base my commits and Pull Requests against.
2. I have commented my proposed changes within the code.
3. I am willing to help maintain this change if there are issues with it later.
4. It is compatible with the EUPL 1.2 license
5. I have squashed any insignificant commits. (git rebase)
6. My change does not modify src/dnsmasq/. That tree is a verbatim copy of upstream dnsmasq and we do not carry anything in it that deviates from upstream. Fixes have to go through the dnsmasq-discuss mailing list first, we merge them once they are in dnsmasq master.

Checklist:

• The code change is tested and works locally.
• I based my code and PRs against the repository's development branch.
• I signed off all commits. Pi-hole enforces the DCO for all contributions
• I signed all my commits. Pi-hole requires signatures to verify authorship
• I have read the above and my PR is ready for review.

[Copilot]

Copilot was unable to review this pull request because the user who requested the review has insufficient remaining quota.