unfiltered/unfiltered — pull request #219 by avdv (2014-05-23 15:04:29+00:00)
Title: send a LastHttpContent marker after a ChunkedStream

In case a resource was not a FileSystemResource, the HTTP response was
not correctly terminated, which - when using HTTP/1.1 keepAlive -
resulted in the following exception to be thrown for the next request:

```
could not write header io.netty.handler.codec.EncoderException:
java.lang.IllegalStateException: unexpected message type: DefaultHttpResponse
...
Caused by:
java.lang.IllegalStateException: unexpected message type: DefaultHttpResponse
```