Vendored pymumble (azlux, GPL-3.0 - see LICENSE in this directory) with mumble_pb2.py regenerated from the
official Mumble.proto via grpcio-tools (protobuf>=3.19 compatible).
Regenerate: python -m grpc_tools.protoc --python_out=<this dir>
  --proto_path=<this dir> mumble.proto
