Add note on how to disable passthrough mode
v3.5.0
======
+Important note:
+
+* The new standalone server and Grid Node feature a "pass through"
+ mode. If you see changes to the Selenium WebDriver "logging" APIs or
+ automatic capture of screenshots on error (or if you want the old
+ behaviour back) you can do so by executing:
+
+ `java -jar selenium-server-standalone-3.5.0.jar -enablePassThrough false`
+
* Add support for a new "pass through" mode. This allows a connection
from your test's RemoteWebDriver, through the Grid Hub, to a Grid
Node, and down to a DriverService and thence the browser to use the
