From: testn <test1_at_doramail.com>
Date: Thu, 28 May 2015 08:14:05 -0700 (MST)
That's how grizzly-http-client was written to use FeedableBodyGenerator even
though it seems unnecessary to convert an InputStream into an OutputStream
to feed it down to Grizzly again where Grizzly could have read the data
directly from InputStream in worker thread.