Use the \setshortversion macro to specify the abbreviated version number.

This partially addresses SourceForge bug #114318.

Fix the release number -- this is supposed to be the *Python* release,
not the documentation release!  The later is given by the combination of
the Python release number and the date.  Add a comment so I can keep it
straight.

Doc/texinputs/boilerplate.tex

@@ -5,5 +5,6 @@
 	E-mail: \email{python-docs@python.org}
 }
 
-\date{September 12, 2000}			% XXX update before release!
-\release{2.0b1.1}
+\date{\today}				% XXX update before release!
+\release{2.0b1}				% software release, not documentation
+\setshortversion{2.0}			% major.minor only for Python