changelog update

CHANGELOG.md

@@ -51,6 +51,7 @@ It is highly recommended that all users migrate to the new riemann output plugin
 - [#2287](https://github.com/influxdata/telegraf/issues/2287): Kubernetes input: Handle null startTime for stopped pods.
 - [#2356](https://github.com/influxdata/telegraf/issues/2356): cpu input panic when /proc/stat is empty.
 - [#2341](https://github.com/influxdata/telegraf/issues/2341): telegraf swallowing panics in --test mode.
+- [#2358](https://github.com/influxdata/telegraf/pull/2358): Create pidfile with 644 permissions & defer file deletion.
 
 ## v1.2.1 [2017-02-01]