[4.x] Avoid reflecting back user data in exception messages #6990
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Avoid reflecting back user data in exception messages. There is a new flag in RequestException that can be used to control when it is safe to include a message in a response entity and when it is not. It is by default set to true (safe) but is now set to false in Http1Prologue to avoid data leaks. New test added. See issue #6986.