[TYPO3-core] RFC #5203: Feature: Implement fileoperation permission configuration from be_groups

[Christian Kuhn]

This is an SVN patch request.

Type: Feature

Bugtracker references:
http://bugs.typo3.org/view.php?id=5203

Branches: trunk

Problem:
It would be more convenient to configure fileoperation permissions in 
backend groups, not only in backend users.

Solution:
- Added field fileoper_perms to be_groups table
- Added / adapted TCA, locallang and CSH stuff
- Added handling in t3lib/class.t3lib_userauthgroup.php to OR 
permissions of groups with user permissions
- Introduced function returnFileoperationPermissions() in 
t3lib/class.t3lib_userauthgroup.php
- Use returnFileoperationPermissions() instead of 
$BE_USER->user['fileoper_perms'] in core files

Notes:
Values of groups and user settings are OR'ed, so backwards compatibility 
is not broken. This is comparable to workspace_perms and other stuff 
that can be set both for groups and users. Default group permissions is 0.


Cheers
Christian
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