MDL-23308 all "course files" are legacy feature, we must tell this to…

… all our users, we can not use "Course files" anymore because we really want them to migrate. Sorry, please do not revert this change again. If somebody does not like this they have to tweak their language pack, it is officially "legacy" file area now.

lang/en/moodle.php

@@ -311,8 +311,8 @@
 $string['courseinfo'] = 'Course info';
 $string['coursemessage'] = 'Message course users';
 $string['coursenotaccessible'] = 'This course does not allow public access';
-$string['courselegacyfiles'] = 'Course files';
-$string['courselegacyfiles_help'] = 'Files are now stored in separate areas for each activity or specific purposes, the old course files area is not available any more in new courses. This was necessary for real access control implementation, reliable backup/restore, etc.';
+$string['courselegacyfiles'] = 'Legacy course files';
+$string['courselegacyfiles_help'] = 'Files are now stored in separate areas for each activity or specific purposes, the old course files area is not available by default in new courses. Only new file storage implements reliable access control, backup/restore, etc.';
 $string['courseoverview'] = 'Course overview';
 $string['courseoverviewgraph'] = 'Course overview graph';
 $string['courseprofiles'] = 'Course profiles';