Merge branch 'pr-55320'

* pr-55320:
  nixos/release-notes: mention breaking changes with matrix-synapse update
  nixos/matrix-synapse: reload service with SIGHUP
  nixos/tests/matrix-synapse: generate ca and certificates
  nixos/matrix-synapse: use python to launch synapse
  pythonPackages.pymacaroons-pynacl: remove unmaintained fork
  matrix-synapse: 0.34.1.1 -> 0.99.0
  pythonPackages.pymacaroons: init at 0.13.0