golang/flannel @ fc5fbd7aa3be924b06e770bfb0e7f4d69d649735

Tom Denham 7722da5eb9 backend/extension: Allow the backend data to be empty		%!s(int64=7) %!d(string=hai) anos
..
extension.go	fb4a25e608 backend/extension: Introduce new extension backend	%!s(int64=7) %!d(string=hai) anos
extension_network.go	7722da5eb9 backend/extension: Allow the backend data to be empty	%!s(int64=7) %!d(string=hai) anos