istio

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apiVersion: release-notes/v2
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kind: feature
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area: telemetry
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releaseNotes:
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  **Added** xDS workload metadata discovery to TCP metadata exchange filter as a fallback. This requires enabling `PEER_METADATA_DISCOVERY` flag on the proxy, and `PILOT_ENABLE_AMBIENT_CONTROLLERS` on the control plane.
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  **Added** a flag `PILOT_DISABLE_MX_ALPN` on the control plane to disable advertising TCP metadata exchange ALPN token `istio-peer-exchange`.
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