Document setting JFR options with applets and Java WebStart applications.

There are two ways to enable JFR with applets and WebStart applications:
  1. use JAVA_TOOL_OPTIONS environment variable to specify JFR command line options
(.e.g. set JAVA_TOOL_OPTIONS=-XX:+UnlockCommercialFeatures -XX:+FlightRecorder -XX:StartFlightRecording=duration=60s,filename=c:\test\recording.jfr).
  2. specify JFR command line options in the Java Control Panel as runtime parameters for specific JRE.

Enabling JFR on per application basis (in JNLP file) is not supported.