Upadte documentation for streaming response

docs/sanic/response.md

@@ -60,6 +60,8 @@ async def index(request):
     return response.stream(streaming_fn, content_type='text/plain')
 ```
 
+See [Streaming](streaming.md) for more information.
+
 ## File Streaming
 For large files, a combination of File and Streaming above
 ```python

docs/sanic/streaming.md

@@ -117,3 +117,5 @@ async def index(request):
 
     return stream(stream_from_db)
 ```
+
+If a client supports HTTP/1.1, Sanic will use [chunked transfer encoding](https://en.wikipedia.org/wiki/Chunked_transfer_encoding); you can explicitly enable or disable it using `chunked` option of the `stream` function.