Better handling of forbidden files in dav

apps/dav/lib/Connector/Sabre/Directory.php

@@ -196,6 +196,8 @@ class Directory extends \OCA\DAV\Connector\Sabre\Node
 				throw new \Sabre\DAV\Exception\ServiceUnavailable($e->getMessage());
 			} catch (\OCP\Files\InvalidPathException $ex) {
 				throw new InvalidPath($ex->getMessage());
+			} catch (ForbiddenException $e) {
+				throw new \Sabre\DAV\Exception\Forbidden();
 			}
 		}
 

apps/dav/lib/Connector/Sabre/ObjectTree.php

@@ -161,6 +161,8 @@ class ObjectTree extends \Sabre\DAV\Tree {
 				throw new \Sabre\DAV\Exception\NotFound('Storage ' . $path . ' is invalid');
 			} catch (LockedException $e) {
 				throw new \Sabre\DAV\Exception\Locked();
+			} catch (ForbiddenException $e) {
+				throw new \Sabre\DAV\Exception\Forbidden();
 			}
 		}