* cli: `terraform state list` now accepts a new argument `-id=...` for filtering resources for display by their remote ids [GH-17221]
* core: https URLs are now supported in the HTTP_PROXY environment variable [go1.10:net/http](https://golang.org/doc/go1.10#net/http)
* cli: `terraform destroy` now uses the option `-auto-approve` instead of `-force`, for consistency with `terraform apply`. The old flag is preserved for backward-compatibility, but is now deprecated; it will be retained for at least one major release. [GH-17218]
* connection/ssh: Add support for host key verifiation [GH-17354]
* backend/s3: add support for the cn-northwest-1 region [GH-17216]