Http-process-proxy

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* Forward "Transfer-Encoding: chunked" bodies

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* Fix for previous setTimeout error

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* Disable timeout before querying "watch-project". Should make startup
more reliable. (We got a timeout on a 2015 2-core OS X machine.)

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* Avoid race that closed Websockets connections prematurely.

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* Close Keepalive connections when changing state

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* Add ``--debug`` command-line option. (It's rather verbose!)