fine-grained permissions are not applied to directories when browsing sources

[esizikov@…]

When trying to develop a custom plugin which uses the shining new fine-grained permissions available in the svn trunk, I've stacked with directory listing not obey the developed plugin.

The problem is that fine-grained permissions are not applied to directories when browsing sources, but only to file nodes.

I've made a proof-of-concept patch for the required functionality, which acts like the existing one for files.

[cboos]

Thanks for creating the ticket and starting work in this direction.

I'm not completely decided if this should go in milestone:0.11.1 or milestone:0.12 yet, but doing the conservative choice for now.

[esizikov@…]

Fixes: apply permission check to all nodes, not only folders as in the first version; catch PermissionError? exception to allow other exceptions raising.