Publish event to notify the server configuration changed and reset some configuration.

[KomachiSion]

Is your feature request related to a problem? Please describe.
Some server configuration is defined on application.properties or JVM parameters, and get from EnvUtil.

Some config like DistroConfig, PushConfig and AuthConfig only set when server start.

So I think we can add an event to notify this Config when application.properties changed.

Describe the solution you'd like

1. Can change some config without restarting.
2. reduce frequently call EnvUtil.getProperties to reduce CPU cost.

Describe alternatives you've considered
Add an event when listen application.properties changed and EnvUtil has updated.