This property is only used on Linux/UNIX platforms.
Spawns a fork of the Wrapper process as a detached non-session group leader.
This means that the process will continue to run even after the console from which the Wrapper process was launched has been closed.
In most cases, this property will not be set from within the wrapper.conf file.
It can be passed to the Wrapper process by the shell script which launches the Wrapper.
An example can be found in the App.sh.in file in the src/bin directory (on older Wrapper versions, this file was named 'sh.script.in').