1.1.6 release notes (#4113) (#4216)

content/about/notes/1.1.6/index.md

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+---
+title: Istio 1.1.6
+publishdate: 2019-05-11
+icon: notes
+release: 1.1.6
+---
+
+This release includes several bug fixes and improvements to robustness.  This release note describes what's different between Istio 1.1.5 and Istio 1.1.6.
+
+{{< relnote >}}

content/blog/2019/announcing-1.1.6/index.md

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+---
+title: Announcing Istio 1.1.6
+description: Istio 1.1.6 patch release.
+publishdate: 2019-05-11
+attribution: The Istio Team
+release: 1.1.6
+---
+
+We're pleased to announce the availability of Istio 1.1.6. Please see below for what's changed.
+
+{{< relnote >}}

content/boilerplates/notes/1.1.6.md

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+## Bug fixes
+
+- Fix Galley Helm charts so that the `validatingwebhookconfiguration` object can now deployed to a namespace other than `istio-system` ([Issue 13625](https://github.com/istio/istio/issues/13625)).
+- Additional Helm chart fixes for anti-affinity support: fix `gatewaypodAntiAffinityRequiredDuringScheduling` and `podAntiAffinityLabelSelector` match expressions and fix the default value for `podAntiAffinityLabelSelector` ([Issue 13892](https://github.com/istio/istio/issues/13892)).
+- Make Pilot handle a condition where Envoy continues to request routes for a deleted gateway while listeners are still draining ([Issue 13739](https://github.com/istio/istio/issues/13739)).
+
+## Small enhancements
+
+- If access logs are enabled, `passthrough` listener requests will be logged.
+- Make Pilot tolerate unknown JSON fields to make it easier to rollback to older versions during upgrade.
+- Add support for fallback secrets to `SDS` which Envoy can use instead of waiting indefinitely for late or non-existent secrets during startup ([Issue 13853](https://github.com/istio/istio/issues/13853)).