ZF2-156: HTTP 308 Resume Incomplete missing in Zend\Http\Response
Zend\Http\Response is missing a constant for HTTP 308 Resume Incomplete. When trying to set this status code, it will throw an Exception.
The solution is to add the following line to the list of constants: const STATUS_CODE_308 = 308;
This status code is used by Google Docs to upload files, so it might be a good addition.