docs on fine-grained permissions don't warn that groups cannot be used in authz file

[abeld@…]

The documentation at ​http://trac.edgewall.org/wiki/TracFineGrainedPermissions does not mention the fact that group names used by trac are not automatically useable in the authz file.

As described on ​http://trac.edgewall.org/wiki/TracPermissions groups in trac's permission system can be created by simply assinging somebody to the group. So, if I "give" 'joeuser' the permission 'trusted-user' permission, I have automatically created the 'trusted-user' group. However, if I use 'trusted-user' in the authz file, it will be ignored, I have to use 'joeuser', or list all groups again in a '[groups]' section in the authz file.

This should at least be mentioned in the docs describing the fine-grained permissions, or, even better, the implementation should be fixed to also use the groups defined in trac in the old-style way.