Update embedded dnsmasq to v2.89

[DL6ER]

What does this implement/fix?

Update the embedded dnsmasq to v2.89

This fixes a very severe albeit almost impossible to trigger internal cache bug.

CHANGELOG

version 2.89
        Fix bug introduced in 2.88 (commit fe91134b) which can result
	in corruption of the DNS cache internal data structures and
	logging of "cache internal error". This has only been seen
	in one place in the wild, and it took considerable effort
	to even generate a test case to reproduce it, but there's
	no way to be sure it won't strike, and the effect is to break
	the cache badly. Installations with DNSSEC enabled are more
	likely to see the problem, but not running DNSSEC does not
	guarantee that it won't happen. Thanks to Timo van Roermund
	for reporting the bug and for his great efforts in chasing
	it down.

This release furthermore adds a Pi-hole provided feature to reduce the footprint/identificability of your DNS server.

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2. I have commented my proposed changes within the code.
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4. It is compatible with the EUPL 1.2 license
5. I have squashed any insignificant commits. (git rebase)

Checklist:

• The code change is tested and works locally.
• I based my code and PRs against the repositories developmental branch.
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• I have read the above and my PR is ready for review.

[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-v5-21-web-v5-18-4-and-core-v5-15-4-released/61096/1