Changelog for 2.147

What's new in 2.147 (2018-10-14)

• Update Winstone-Jetty from 5.0 to 5.1 to update Jetty to 9.4.12, picking up TLS 1.3 support and fixes towards Java 11. (issue 51805, issue 53929, Winstone-Jetty changelog, Jetty changelog)
• Update Stapler from 1.254.2 to 1.255 to integrate a fix related to StaplerProxy#getTarget() return value handling. (pull 3690, stapler/stapler#149)
• Print a warning when the long deprecated method Secret#toString() is being used. (pull 3668)
• Add telemetry trials related to browser languages and Stapler request dispatching. (pull 3688, pull 3687, stapler/stapler#148)