R3.16 changelog additions

[geekosaur]

We missed a number of backports, some of which had changelogs.

---

Template B: This PR does not modify behaviour or interface

E.g. the PR only touches documentation or tests, does refactorings, etc.

Include the following checklist in your PR:

• Patches conform to the coding conventions.
• Is this a PR that fixes CI? If so, it will need to be backported to older cabal release branches (ask maintainers for directions).

[ffaf1]

Thanks.

[Mikolaj]

Thank you!

[ulysses4ever]

Thanks!

[mergify]

Merge Queue Status

✅ The pull request has been merged

This pull request spent 11 minutes 26 seconds in the queue, with no time running CI.
The checks were run in-place.

Required conditions to merge

• #approved-reviews-by >= 1 [🛡 GitHub branch protection]
  • R3.16 changelog additions #11328
• #changes-requested-reviews-by = 0 [🛡 GitHub branch protection]
  • R3.16 changelog additions #11328
• #review-threads-unresolved = 0 [🛡 GitHub branch protection]
  • R3.16 changelog additions #11328
• any of [🛡 GitHub branch protection]:
  • check-success = Doctest Cabal
  • check-neutral = Doctest Cabal
  • check-skipped = Doctest Cabal
• any of [🛡 GitHub branch protection]:
  • check-success = Meta checks
  • check-neutral = Meta checks
  • check-skipped = Meta checks
• any of [🛡 GitHub branch protection]:
  • check-success = Validate post job
  • check-neutral = Validate post job
  • check-skipped = Validate post job
• any of [🛡 GitHub branch protection]:
  • check-success = docs/readthedocs.org:cabal
  • check-neutral = docs/readthedocs.org:cabal
  • check-skipped = docs/readthedocs.org:cabal
• any of [🛡 GitHub branch protection]:
  • check-success = Bootstrap post job
  • check-neutral = Bootstrap post job
  • check-skipped = Bootstrap post job
• any of [🛡 GitHub branch protection]:
  • check-success = whitespace
  • check-neutral = whitespace
  • check-skipped = whitespace