Identifying streams more precisely

Two issues were raised about the use of the words "existing" and "current" to refer to streams.  These were a little squishy, so I tightened the language a little.  The text no longer uses either word to refer to streams, instead using stream states to describe where the relevant text applies and favouring "identified" as a fallback.
You've changed the meaning here.  Modifying this affects (original) "all streams, *including* existing streams" -- now it *only* affects existing streams (open/half-closed (remote)).  I'd keep it as all streams, maybe add "regardless of state" if you feel the clarification is needed.