Merge remote-tracking branch 'origin/release-v1.47'

docs/reverse_proxy.md

docs/sample_config.yaml

docs/setup/installation.md

docs/synctl_workers.md

...ystemd-with-workers/system/matrix-synapse-worker@.service

docs/systemd-with-workers/system/matrix-synapse.service

docs/turn-howto.md

docs/upgrade.md

docs/usage/administration/admin_api/background_updates.md

docs/workers.md

mypy.ini

scripts-dev/check-newsfragment

scripts-dev/check_line_terminators.sh

scripts-dev/complement.sh

scripts-dev/config-lint.sh

scripts-dev/docker_update_debian_changelog.sh

scripts-dev/generate_sample_config

scripts-dev/next_github_number.sh

scripts/synapse_port_db

setup.py