Feature: #82266 - Backend Users System Maintainers

See Issue #82266

Description

A new role for Backend Users is introduced - System Maintainers. These maintainers (“super admins”) are able to access the install tool modules from within the TYPO3 Backend, thus, the only place to modify the system-wide configuration located in $TYPO3_CONF_VARS, respectively LocalConfiguration.php.

Extension management and language pack handling are also “system management” and thus restricted to the new system management role.

The list of allowed admins that are assigned as system maintainers can only be done within the TYPO3 Install Tool or by modifying the new configuration option TYPO3_CONF_VARS[SYS][systemMaintainers].

If no system maintainer is set up, then all administrators are assigned the system maintainer role.

In Development context, all administrators are system maintainers as well.

Impact

It is now possible to only allow access the install tool from within the TYPO3 Backend for certain Backend Users.

Registering Backend Modules can now be restricted to “systemMaintainer” access, so they are only shown for selected administrators.