add link to envoy attributes (#7979)

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Pengyuan Bian 2020-08-19 10:53:11 -07:00 committed by GitHub
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@ -175,8 +175,8 @@ has(request.host) ? request.host : "unknown"
For more information, see [Common Expression Language](https://opensource.google/projects/cel).
Istio exposes all standard Envoy attributes. Additionally, you can use the
following extra attributes.
Istio exposes all standard [Envoy attributes](https://www.envoyproxy.io/docs/envoy/latest/intro/arch_overview/security/rbac_filter#condition).
Additionally, you can use the following extra attributes.
|Attribute | Type | Value |
|---|---|---|