2.16: Mention log.compress and log.rotate settings

The new settings were included in 2.16 but omitted from the
release notes.

Change-Id: Idd29c4f200ff1476d9a05a1b9f0877d782819d32
diff --git a/pages/site/releases/2.16.md b/pages/site/releases/2.16.md
index 7d119db..74ea30b 100644
--- a/pages/site/releases/2.16.md
+++ b/pages/site/releases/2.16.md
@@ -209,6 +209,21 @@
 
 Note: the capability was added in 2.16 but only documented since 2.16.1.
 
+### Disable log file rotation and compression
+
+On sites where log file rotation and compression is done by an external
+service such as [logrotate](http://manpages.ubuntu.com/manpages/zesty/man8/logrotate.8.html),
+administrators may wish to disable Gerrit's default log rotation and
+compression.
+
+This can now be done by setting
+[`log.rotate`](http://gerrit-documentation.storage.googleapis.com/Documentation/2.16/config-gerrit.html#log.rotate)
+and [`log.compress`](http://gerrit-documentation.storage.googleapis.com/Documentation/2.16/config-gerrit.html#log.compress)
+to `false`.
+
+Both settings default to `true` when not set, to maintain consistent behavior
+with previous releases.
+
 ### PolyGerrit enhancements
 
 #### Repo access view