Merge branch 'develop' into cross-signing_federation

CHANGES.md

MANIFEST.in

changelog.d/1172.misc

changelog.d/2142.feature

changelog.d/2380.bugfix

changelog.d/3436.bugfix

changelog.d/4088.bugfix

changelog.d/5726.feature

changelog.d/5759.misc

changelog.d/5769.feature

changelog.d/5978.misc

changelog.d/6019.misc

changelog.d/6077.misc

changelog.d/6084.misc

changelog.d/6101.misc

changelog.d/6108.misc

changelog.d/6109.bugfix

changelog.d/6114.feature

changelog.d/6115.misc

changelog.d/6125.feature