Issue #7796: Add link to Jan Kaliszewski's alternate constructor and ABC for named tuples.

Doc/library/collections.rst

@@ -857,9 +857,16 @@ and more efficient to use a simple class declaration:
 
 .. seealso::
 
-   `Named tuple recipe <http://code.activestate.com/recipes/500261/>`_
+   * `Named tuple recipe <http://code.activestate.com/recipes/500261/>`_
      adapted for Python 2.4.
 
+   * `Recipe for named tuple abstract base class with a metaclass mix-in
+     <http://code.activestate.com/recipes/577629-namedtupleabc-abstract-base-class-mix-in-for-named/>`_
+     by Jan Kaliszewski.  Besides providing an :term:`abstract base class` for
+     named tuples, it also supports an alternate :term:`metaclass`-based
+     constructor that is convenient for use cases where named tuples are being
+     subclassed.
+
 
 :class:`OrderedDict` objects
 ----------------------------

Misc/ACKS

@@ -452,6 +452,7 @@ Tamito Kajiyama
 Peter van Kampen
 Rafe Kaplan
 Jacob Kaplan-Moss
+Jan Kaliszewski
 Arkady Koplyarov
 Lou Kates
 Hiroaki Kawai