Copyright for python-grpc-tools source package in Huanghe V3.0

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: python-grpc-tools
Source: https://grpc.io/

Files: *
Copyright: © 2016 gRPC authors
License: Apache-2.0

Files: third_party/protobuf/*
Copyright: © 2008 Google, Inc
License: BSD-3-clause

Files: third_party/protobuf/src/google/protobuf/stubs/atomicops_internals_generic_gcc.h
Copyright: © 2013 Red Hat Inc
License: BSD-3-clause

Files: third_party/protobuf/src/google/protobuf/stubs/atomicops_internals_power.h
Copyright: © 2014 Bloomberg Finance LP
License: BSD-3-clause

Files: debian/*
Copyright: © 2018 Chris Lamb 
License: Apache-2.0

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License: BSD-3-clause
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