golang/flannel @ 3a7dc5b958651a1090cbb94ead3e2923daed77ec

Rajat Chopra 86ae7c4d53 Merge pull request #1334 from chenchun/hang		%!s(int64=4) %!d(string=hai) anos
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extension.go	6c0ec9abda Preserve environment for extension backend	%!s(int64=4) %!d(string=hai) anos
extension_network.go	78035d0c8c Fix flannel hang if lease expired	%!s(int64=4) %!d(string=hai) anos