Consider adding a switch to disable JMX completely

[snicoll]

Right now, spring.jmx.enabled is about our own support, i.e. detecting a custom MBeanServer and exposing relevant beans in the context as well as switching things specific (connection pool handling).

There are other components that touches the MBeanServer directly, Tomcat being the most prominent example but not the only one. #16498 is going to handle Tomcat with the introduction of a specific property to switch that on if our own support is off.

This one is about researching the idea of extending the switch to things that we know and that exposes things to JMX by default so that they don't if JMX support is disabled.

[snicoll]

This hasn't moved in 5 years and nobody seemed to be interested by the idea. Looking at the outcome of #16498, I don't think we should pursue this.