* Added hook as requested and provided by Stig N. Faerch.
*
* This hook is used by the extension 'roles'. With this hook it's possible to
* control the backend usergroup access, through manipulating a sql-sentence.
* In the case of 'roles', the hook is used to limit access to the selected
* backend usergroup (which is marked as a role). This is very powerful when
* you need to have a better overview in the backend.


git-svn-id: https://svn.typo3.org/TYPO3v4/Core/trunk@770 709f56b5-9817-0410-a4d7-c38de5d9e867