A server hook for plugin that triggers when the server config is updated

[raazkarkee405]

Describe the problem to be solved

Discussion about this feature is in the forum. https://framacolibri.org/t/is-there-any-server-hook-for-plugin-that-triggers-when-the-server-config-is-updated/19708

Describe the solution you would like

What I want is a hook that triggers when the instance config gets updated.