Draft release notes for 1.0.9 and 1.1.10. (#4566)

content/about/notes/1.0.9/index.md

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+---
+title: Istio 1.0.9
+publishdate: 2019-06-28
+icon: notes
+release: 1.0.9
+---
+
+This release includes bug fixes to improve robustness.  This release note describes what's different between Istio 1.0.8 and Istio 1.0.9.
+
+{{< relnote >}}

content/about/notes/1.1.10/index.md

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+---
+title: Istio 1.1.10
+publishdate: 2019-06-28
+icon: notes
+release: 1.1.10
+---
+
+This release includes bug fixes to improve robustness.  This release note describes what's different between Istio 1.1.9 and Istio 1.1.10.
+
+{{< relnote >}}

content/blog/2019/announcing-1.0.9/index.md

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+---
+title: Announcing Istio 1.0.9
+description: Istio 1.0.9 patch release.
+publishdate: 2019-06-28
+attribution: The Istio Team
+release: 1.0.9
+---
+
+We're pleased to announce the availability of Istio 1.0.9. Please see below for what's changed.
+
+{{< relnote >}}

content/blog/2019/announcing-1.1.10/index.md

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+---
+title: Announcing Istio 1.1.10
+description: Istio 1.1.10 patch release.
+publishdate: 2019-06-28
+attribution: The Istio Team
+release: 1.1.10
+---
+
+We're pleased to announce the availability of Istio 1.1.10. Please see below for what's changed.
+
+{{< relnote >}}

content/boilerplates/notes/1.0.9.md

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+## Bug fixes
+
+- Fix crash in Istio's JWT Envoy filter caused by malformed JWT ([Issue 15084](https://github.com/istio/istio/issues/15084)).

content/boilerplates/notes/1.1.10.md

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+## Bug fixes
+
+- Eliminate 503 errors caused by Envoy not being able to talk to the SDS Node Agent after a restart ([Issue 14853](https://github.com/istio/istio/issues/14853)).
+- Fix cause of 'TLS error: Secret is not supplied by SDS' errors during upgrade ([Issue 15020](https://github.com/istio/istio/issues/15020)).
+- Fix crash in Istio's JWT Envoy filter caused by malformed JWT ([Issue 15084](https://github.com/istio/istio/issues/15084)).