This resource is used to inform the device that you will begin to make changes on the web-server.
After each change made to the Web-server, it restarts to apply the changes.
Calling this resource allows you to inform the device that you will begin to make changes on the web-server, and to not restart until you are finished.
Once the web-server has been informed of this, you can change what you want on the web server.
Once your changes are complete you need to call the resource /system/web-server/end-update.
If this resource is not called before another one on the web-server, it will restart immediately after the response of the request to apply the changes.
No body message is needed.
If this parameter is not in the request, the Application/Json will be chosen by default.
There are multiple possible values (according the resource):
The first two are the most often used.