/usr/share/gocode/src/github.com/docker/libnetwork/drivers/windows/overlay/ is in golang-github-docker-libnetwork-dev 0.8.0-dev.2+git20170202.599.45b4086-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gocode/src/github.com/docker/libnetwork/drivers/windows/overlay/joinleave_windows.go
/usr/share/gocode/src/github.com/docker/libnetwork/drivers/windows/overlay/ov_endpoint_windows.go
/usr/share/gocode/src/github.com/docker/libnetwork/drivers/windows/overlay/ov_network_local_windows.go
/usr/share/gocode/src/github.com/docker/libnetwork/drivers/windows/overlay/ov_network_windows.go
/usr/share/gocode/src/github.com/docker/libnetwork/drivers/windows/overlay/ov_serf_windows.go
/usr/share/gocode/src/github.com/docker/libnetwork/drivers/windows/overlay/overlay.pb.go
/usr/share/gocode/src/github.com/docker/libnetwork/drivers/windows/overlay/overlay.proto
/usr/share/gocode/src/github.com/docker/libnetwork/drivers/windows/overlay/overlay_windows.go
/usr/share/gocode/src/github.com/docker/libnetwork/drivers/windows/overlay/peerdb_windows.go