implement access-denied-exception? for smb-fs
implement access-denied-exception? for smb-fs

note that we also handle NT_STATUS_NO_SUCH_FILE errors like access
denied errors.

depending on the rights set on our samba server I get "no such file"
errors when the samba user does not have permissions to list a directory

brainbot-com/es-nozzle,brainbot-com/es-nozzle