Release notes for v3.17.0: `docs/release-notes/v3.17.0.md` (used as the
GitHub release body by `deploy.yml`) and the `CHANGELOG.md` entry.
24 commits since v3.16.0, counted with #2389, which is merged before
this PR. Issues closed come from each PR's `closingIssuesReferences`.
Docs only. After merge: tag `v3.17.0` on the merge commit once master CI
is green and the `:edge` image carries that commit.