Merge pull request #10494 from owncloud/fix_upload_to_public_folder

set incognitoMode to true during upload to a public folder

apps/files/ajax/upload.php

@@ -24,6 +24,8 @@ if (empty($_POST['dirToken'])) {
 	// and the upload/file transfer code needs to be refactored into a utility method
 	// that could be used there
 
+	\OC_User::setIncognitoMode(true);
+
 	// return only read permissions for public upload
 	$allowedPermissions = OCP\PERMISSION_READ;
 	$publicDirectory = !empty($_POST['subdir']) ? $_POST['subdir'] : '/';