Release v1.28.9 (2020-01-24)
===

### Service Client Updates
* `service/datasync`: Updates service API and documentation
* `service/ecs`: Updates service API and documentation
  * This release provides support for tagging Amazon ECS task sets for services using external deployment controllers.
* `service/eks`: Updates service API
* `service/opsworkscm`: Updates service documentation
  * AWS OpsWorks for Chef Automate now supports in-place upgrade to Chef Automate 2. Eligible servers can be updated through the management console, CLI and APIs.
* `service/workspaces`: Updates service documentation
  * Documentation updates for WorkSpaces

)

Adds support for the EC2ThrottledException throttling exception code.
The SDK will now treat this error code as throttling.

…to the endpoint URL (#3102)

===

### Service Client Updates
* `service/cloudfront`: Updates service documentation
  * Documentation updates for CloudFront
* `service/ec2`: Updates service API and documentation
  * Amazon VPC Flow Logs adds support for 1-minute aggregation intervals.
* `service/iot`: Updates service API
  * Updated ThrottlingException documentation to report that the error code is 400, and not 429, to reflect actual system behaviour.
* `service/kafka`: Updates service API, documentation, and paginators
* `service/ssm`: Updates service API and documentation
  * This feature ensures that an instance is patched up to the available patches on a particular date. It can be enabled by selecting the 'ApproveUntilDate' option as the auto-approval rule while creating the patch baseline. ApproveUntilDate - The cutoff date for auto approval of released patches. Any patches released on or before this date will be installed automatically.
* `service/storagegateway`: Updates service API
  * Adding KVM as a support hypervisor
* `service/workmail`: Updates service API and documentation
  * This release adds support for tagging Amazon WorkMail organizations.

### SDK Enhancements
* `aws/request`: Add support for EC2 specific throttle exception code
  * Adds support for the EC2ThrottledException throttling exception code. The SDK will now treat this error code as throttling.

### SDK Bugs
* `aws/request`: Fixes an issue where the HTTP host header did not reflect changes to the endpoint URL ([#3102](#3102))
  * Fixes [#3093](#3093)