+ http: introduce `HttpMessage.asPartStream` to emulate slicing for a full HttpMessage
= simple-http-server: emulate chunking for complete requests to '/file-upload', fixes #513
= routing: add pending test case observing #533
Merge pull request #515 from jrudolph/i/513/fix-file-upload-example

simple-http-server: emulate chunking for complete requests to '/file-upload', fixes #513