Fix lint

pkg/cluster/spec/server_config.go

@@ -143,6 +143,23 @@ func FlattenMap(ms map[string]interface{}) map[string]interface{} {
 	return result
 }
 
+// MergeConfig merge two or more config into one and unflat them
+// config1:
+//   a.b.a: 1
+//   a.b.b: 2
+// config2:
+//   a.b.a: 3
+//   a.b.c: 4
+// config3:
+//   b.c = 5
+// After MergeConfig(config1, config2, config3):
+//   a:
+//     b:
+//       a: 3
+//       b: 2
+//       c: 4
+//   b:
+//     c: 5
 func MergeConfig(orig map[string]interface{}, overwrites ...map[string]interface{}) map[string]interface{} {
 	lhs := FoldMap(orig)
 	for _, overwrite := range overwrites {