CHANGELOG-3.4: highlight YAML log-output change
@@ -72,6 +72,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.3.0...v3.4.0) and [
- Remove [`embed.Config.SetupLogging`](https://github.com/coreos/etcd/pull/9572).
- Now logger is set up automatically based on [`embed.Config.Logger`, `embed.Config.LogOutput`, `embed.Config.Debug` fields](https://github.com/coreos/etcd/pull/9572).
- Change [`embed.Config.LogOutput` type from `string` to `[]string`](https://github.com/coreos/etcd/pull/9579) to support multiple log outputs.
+ - Now that `log-output` accepts multiple writers, etcd configuration YAML file `log-output` field must be changed to `[]string` type.
+ - Previously, `etcd.config.yaml` can have `log-output: default` field, now must be `log-output: [default]`.
- Remove [`pkg/cors` package](https://github.com/coreos/etcd/pull/9490).
- Move `"github.com/coreos/etcd/snap"` to [`"github.com/coreos/etcd/raftsnap"`](https://github.com/coreos/etcd/pull/9211).
- Move `"github.com/coreos/etcd/etcdserver/auth"` to [`"github.com/coreos/etcd/etcdserver/v2auth"`](https://github.com/coreos/etcd/pull/9275).
