Public preview: TLS 1.3 support on Application Gateway

The new Predefined and CustomV2 policies on Application Gateway come with TLS v1.3 support. They provide improved security and performance benefits, fulfilling the needs of your enterprise security policies. You may use out-of-the-box predefined policies or configure a preferred cipher-suite list by using the CustomV2 policy. Visit the [documentation](https://docs.microsoft.com/en-us/azure/application-gateway/application-gateway-ssl-policy-overview) to find out more on the new policies, supported minimum protocol versions and cipher suites. * Application Gateway * Features * Services * Security * [ Application Gateway](https://azure.microsoft.com/en-gb/products/application-gateway/)