Deprecation: #86110 - FrontendEditingController 

See forge#86110

Description 

The class \TYPO3\CMS\Core\FrontendEditing\FrontendEditingController is not in use anymore, only feedit instantiates the class for legacy reasons.

Also, property FrontendBackendUserAuthentication->frontendEdit which holds an instance of it, has been marked as deprecated.

Impact 

The functionality of this class has been moved into ext:feedit. If an instance needs access to frontend editing, it can be accessed from there.

Affected Installations 

Instances accessing the deprecated class or function will NOT trigger a PHP E_USER_DEPRECATED error.

Migration 

Refer to ext:feedit for inspiration.