docs, test: tidy host normalization for trailing-dot-only scope

- docs: qualify the field reference as spec.headers.host.stripTrailingHostDot (review feedback endorsed by @arkodg)
- test: drop the now-redundant third xDS listener; keep one listener enabling stripTrailingHostDot and one control with no host settings

Signed-off-by: Salim Boulkour <salim.boulkour@algolia.com>

Author: sboulkour

internal/xds/translator/testdata/in/xds-ir/host-normalization.yaml

@@ -31,20 +31,3 @@ http:
                 - host: "2.2.2.2"
                   port: 8082
               name: "second-route-dest/backend/0"
-  - name: "third-listener"
-    address: "::"
-    port: 8083
-    hostnames:
-      - "*"
-    routes:
-      - name: "third-route"
-        hostname: "*"
-        destination:
-          name: "third-route-dest"
-          settings:
-            - endpoints:
-                - host: "3.3.3.3"
-                  port: 8083
-              name: "third-route-dest/backend/0"
-    host:
-      stripTrailingHostDot: true

internal/xds/translator/testdata/out/xds-ir/host-normalization.clusters.yaml

@@ -44,26 +44,3 @@
   name: second-route-dest
   perConnectionBufferLimitBytes: 32768
   type: EDS
-- circuitBreakers:
-    thresholds:
-    - maxRetries: 1024
-  commonLbConfig: {}
-  connectTimeout: 10s
-  dnsLookupFamily: V4_PREFERRED
-  edsClusterConfig:
-    edsConfig:
-      ads: {}
-      resourceApiVersion: V3
-    serviceName: third-route-dest
-  ignoreHealthOnHostRemoval: true
-  loadBalancingPolicy:
-    policies:
-    - typedExtensionConfig:
-        name: envoy.load_balancing_policies.least_request
-        typedConfig:
-          '@type': type.googleapis.com/envoy.extensions.load_balancing_policies.least_request.v3.LeastRequest
-          localityLbConfig:
-            localityWeightedLbConfig: {}
-  name: third-route-dest
-  perConnectionBufferLimitBytes: 32768
-  type: EDS

internal/xds/translator/testdata/out/xds-ir/host-normalization.endpoints.yaml

@@ -22,15 +22,3 @@
     loadBalancingWeight: 1
     locality:
       region: second-route-dest/backend/0
-- clusterName: third-route-dest
-  endpoints:
-  - lbEndpoints:
-    - endpoint:
-        address:
-          socketAddress:
-            address: 3.3.3.3
-            portValue: 8083
-      loadBalancingWeight: 1
-    loadBalancingWeight: 1
-    locality:
-      region: third-route-dest/backend/0

internal/xds/translator/testdata/out/xds-ir/host-normalization.listeners.yaml

@@ -65,37 +65,3 @@
   maxConnectionsToAcceptPerSocketEvent: 1
   name: second-listener
   perConnectionBufferLimitBytes: 32768
-- address:
-    socketAddress:
-      address: '::'
-      portValue: 8083
-  defaultFilterChain:
-    filters:
-    - name: envoy.filters.network.http_connection_manager
-      typedConfig:
-        '@type': type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
-        commonHttpProtocolOptions:
-          headersWithUnderscoresAction: REJECT_REQUEST
-        http2ProtocolOptions:
-          initialConnectionWindowSize: 1048576
-          initialStreamWindowSize: 65536
-          maxConcurrentStreams: 100
-        httpFilters:
-        - name: envoy.filters.http.router
-          typedConfig:
-            '@type': type.googleapis.com/envoy.extensions.filters.http.router.v3.Router
-            suppressEnvoyHeaders: true
-        normalizePath: true
-        rds:
-          configSource:
-            ads: {}
-            resourceApiVersion: V3
-          routeConfigName: third-listener
-        serverHeaderTransformation: PASS_THROUGH
-        statPrefix: http-8083
-        stripTrailingHostDot: true
-        useRemoteAddress: true
-    name: third-listener
-  maxConnectionsToAcceptPerSocketEvent: 1
-  name: third-listener
-  perConnectionBufferLimitBytes: 32768

internal/xds/translator/testdata/out/xds-ir/host-normalization.routes.yaml

@@ -26,17 +26,3 @@
         cluster: second-route-dest
         upgradeConfigs:
         - upgradeType: websocket
-- ignorePortInHostMatching: true
-  name: third-listener
-  virtualHosts:
-  - domains:
-    - '*'
-    name: third-listener/*
-    routes:
-    - match:
-        prefix: /
-      name: third-route
-      route:
-        cluster: third-route-dest
-        upgradeConfigs:
-        - upgradeType: websocket

site/content/en/latest/tasks/traffic/host-header-normalization.md

@@ -13,7 +13,7 @@ using the [ClientTrafficPolicy][] API.
 
 Envoy does not strip trailing dots from the `Host` header by default, unlike some
 other proxies (e.g. NGINX). This means requests with `Host: example.com.` will not
-match routes with domains set to `example.com`. Use `headers.host.stripTrailingHostDot` to
+match routes with domains set to `example.com`. Use `spec.headers.host.stripTrailingHostDot` to
 normalize these requests.
 
 When the host includes a port (e.g. `example.com.:443`), only the trailing dot from