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## edge-21.12.1

This edge release enables by default `EndpointSlices` in the destination
controller, which unblocks any functionality that is specific to
`EndpointSlices` such as as topology-aware hints. It also contains a couple of
internal cleanups and upgrades, by our external contributors!

* Added new check to `linkerd check` verifying the nodes aren't running the old
  Docker container runtime and attempting to run proxy-init as root at the same
  time, which doesn't work (thanks @alex-berger!)
* Enabled `EndpointSlices` in the destination controller by default
* Removed extraneous empty lines and fixed the formatting of warnings in the
  output of `linkerd check -o short`
* Upgraded to go 1.17 (thanks @Juneezee!)
* Removed old protobuf definitions from the codebase (thanks @krzysztofdrys!)