Document AbstractContentElementController::addSharedMaxAgeToResponse

[fritzmg]

and its usage, since you have to apply it yourself currently.

[Tastaturberuf]

Is this still relevant? Because the core-bundle dont use it.

[fritzmg]

Because the core-bundle dont use it.

Hm, good point. May be open a ticket about that in contao/contao. Back when that method was introduced, the core didn't actually have any content elements that could take advantage of it. But now it does.