*: document "SnapshotCount" field change

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

CHANGELOG-3.4.md

@@ -58,6 +58,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.3.0...v3.4.0) and [
   - e.g. exit with error on `ETCD_INITIAL_CLUSTER_TOKEN=abc etcd --initial-cluster-token=def`.
   - e.g. exit with error on `ETCDCTL_ENDPOINTS=abc.com ETCDCTL_API=3 etcdctl endpoint health --endpoints=def.com`.
 - Change [`etcdserverpb.AuthRoleRevokePermissionRequest/key,range_end` fields type from `string` to `bytes`](https://github.com/coreos/etcd/pull/9433).
+- Rename `etcdserver.ServerConfig.SnapCount` field to `etcdserver.ServerConfig.SnapshotCount`, to be consistent with the flag name `etcd --snapshot-count`.
+- Rename `embed.Config.SnapCount` field to [`embed.Config.SnapshotCount`](https://github.com/coreos/etcd/pull/9745), to be consistent with the flag name `etcd --snapshot-count`.
 - Change [`embed.Config.CorsInfo` in `*cors.CORSInfo` type to `embed.Config.CORS` in `map[string]struct{}` type](https://github.com/coreos/etcd/pull/9490).
 - Remove [`embed.Config.SetupLogging`](https://github.com/coreos/etcd/pull/9572).
   - Now logger is set up automatically based on [`embed.Config.Logger`, `embed.Config.LogOutputs`, `embed.Config.Debug` fields](https://github.com/coreos/etcd/pull/9572).
@@ -231,6 +233,7 @@ Note: **v3.5 will deprecate `etcd --log-package-levels` flag for `capnslog`**; `
 - Remove [`embed.Config.SetupLogging`](https://github.com/coreos/etcd/pull/9572).
   - Now logger is set up automatically based on [`embed.Config.Logger`, `embed.Config.LogOutputs`, `embed.Config.Debug` fields](https://github.com/coreos/etcd/pull/9572).
 - Add [`embed.Config.Logger`](https://github.com/coreos/etcd/pull/9518) to support [structured logger `zap`](https://github.com/uber-go/zap) in server-side.
+- Rename `embed.Config.SnapCount` field to [`embed.Config.SnapshotCount`](https://github.com/coreos/etcd/pull/9745), to be consistent with the flag name `etcd --snapshot-count`.
 - Rename [**`embed.Config.LogOutput`** to **`embed.Config.LogOutputs`**](https://github.com/coreos/etcd/pull/9624) to support multiple log outputs.
 - Change [**`embed.Config.LogOutputs`** type from `string` to `[]string`](https://github.com/coreos/etcd/pull/9579) to support multiple log outputs.
 

Documentation/upgrades/upgrade_3_4.md

@@ -90,6 +90,30 @@ if err != nil {
 }
 ```
 
+#### Changed `embed.Config.SnapCount` to `embed.Config.SnapshotCount`
+
+To be consistent with the flag name `etcd --snapshot-count`, `embed.Config.SnapCount` field has been renamed to `embed.Config.SnapshotCount`:
+
+```diff
+import "github.com/coreos/etcd/embed"
+
+cfg := embed.NewConfig()
+-cfg.SnapCount = 100000
++cfg.SnapshotCount = 100000
+```
+
+#### Changed `etcdserver.ServerConfig.SnapCount` to `etcdserver.ServerConfig.SnapshotCount`
+
+To be consistent with the flag name `etcd --snapshot-count`, `etcdserver.ServerConfig.SnapCount` field has been renamed to `etcdserver.ServerConfig.SnapshotCount`:
+
+```diff
+import "github.com/coreos/etcd/etcdserver"
+
+srvcfg := etcdserver.ServerConfig{
+-  SnapCount: 100000,
++  SnapshotCount: 100000,
+```
+
 #### Changed function signature in package `wal`
 
 Changed `wal` function signatures to support structured logger.