linkerd/linkerd2 edge-21.5.1

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edge-21.5.1

This edge release adds support for versioned hint URLs in linkerd check and
support for traffic splitting through ServiceProfiles, among other fixes and
improvements. Additionally, more options have been added to the
linkerd-multicluster and linkerd-jaeger helm charts.

• Added support for traffic splitting through a ServiceProfile's dstOverrides
  field.
• Added nodePorts option to the multicluster helm chart (thanks @psmit!).
• Added nodeSelector and toleration options to the linkerd-jaeger helm chart
  (thanks @aatarasoff!).
• Added versioned hint URLs to the CLI check command when encountering an
  error; each major CLI version will now point to that version's relevant
  section in the Linkerd troubleshooting page.
• Fixed an issue in the CLI check command where error messages for
  healthchecks that were being retried would be outputted repeatedly instead of
  just once.
• Fixed an issue in the proxy injector where a namespace annotated with opaque
  ports would overwrite all service annotations.
• Fixed a regression in the proxy that caused all logs to be output with ANSI
  control characters, by default logs are output in plaintext now.
• Simplified proxy internals in order to distinguish endpoint-forwarding logic
  from the handling of load balanced services.
• Simplified the ingress-mode outbound proxy by requiring the
  l5d-dst-override header and by failing non-HTTP communication. Proxies
  running in ingress-mode will not unexpectedly revert to insecure
  communication as a result.