Copyright for golang-github-dennwc-btrfs source package in Sid

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: github.com/dennwc/btrfs
Upstream-Contact: Denys Smirnov 
Source: https://github.com/dennwc/btrfs

Files: *
Copyright: 2016 Denys Smirnov 
License: Apache-2.0

Files: debian/*
Copyright: 2022 Daniel Swarbrick 
License: Apache-2.0
Comment: Debian packaging is licensed under the same terms as upstream

License: Apache-2.0
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
 .
 http://www.apache.org/licenses/LICENSE-2.0
 .
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
Comment:
 On Debian systems, the complete text of the Apache version 2.0 license
 can be found in "/usr/share/common-licenses/Apache-2.0".