[S17]: Add references to hyperops, feeds, and junctions.

Author: pmichaud

S17-concurrency.pod

@@ -16,15 +16,41 @@ DRAFT: Synopsis 17: Processes and Concurrency
 
     Created: 13 Jun 2005
 
-    Last Modified: 11 Sept 2012
-    Version: 6
-
-This draft document is a paste together from various sources.  The bulk of it is simply
-the old S17-concurrency.pod, which dealt only with concurrency.  Signals were added from
-S16-io, but haven't been merged with the conflicting S17 signals document.  An event loop
-section has been added here because a) Larry mentioned the idea, and b) Moritz suggested
-that L<http://www.seas.upenn.edu/~lipeng/homepage/unify.html> be our model for concurrency,
-and in that model, an event loop underlies the threads.
+    Last Modified: 06 June 2013
+    Version: 7
+
+Concurrency takes many forms in Perl 6, some of which are covered
+in more detail in other Synopses.  Some specific instances of
+concurrency detailed elsewhere includes:
+
+=over
+
+=item *
+
+Hyper operators (L<S03/Hyper operators>)
+
+=item *
+
+Junctions (L<S09/Junctions>)
+
+=item *
+
+Feeds (L<S06/Feed operators>)
+
+=item *
+
+C<hyper> and C<race> operators (L<S02/The hyper operator>)
+
+=back
+
+The remainder of this draft has been pasted from various sources.  The
+bulk of it is simply the old S17-concurrency.pod, which dealt only with 
+concurrency.  Signals were added from S16-io, but haven't been merged 
+with the conflicting S17 signals document.  An event loop section has been 
+added here because a) Larry mentioned the idea, and b) Moritz suggested 
+that L<http://www.seas.upenn.edu/~lipeng/homepage/unify.html> be our 
+model for concurrency, and in that model, an event loop underlies 
+the threads.
 
 =head1 Overview