Avoid a few 301 permanent redirects.
Part of SF patch #773007.
diff --git a/Doc/whatsnew/whatsnew21.tex b/Doc/whatsnew/whatsnew21.tex
index 6c62c1b..7fade37 100644
--- a/Doc/whatsnew/whatsnew21.tex
+++ b/Doc/whatsnew/whatsnew21.tex
@@ -576,7 +576,7 @@
A common complaint from Python users is that there's no single catalog
of all the Python modules in existence. T.~Middleton's Vaults of
-Parnassus at \url{http://www.vex.net/parnassus} are the largest
+Parnassus at \url{http://www.vex.net/parnassus/} are the largest
catalog of Python modules, but registering software at the Vaults is
optional, and many people don't bother.
@@ -599,7 +599,7 @@
be made for users of earlier Python versions. Version 1.0.2 of the
Distutils includes the changes described in PEP 241, as well as
various bugfixes and enhancements. It will be available from
-the Distutils SIG at \url{http://www.python.org/sigs/distutils-sig}.
+the Distutils SIG at \url{http://www.python.org/sigs/distutils-sig/}.
% XXX update when I actually release 1.0.2
@@ -797,7 +797,7 @@
For a fuller discussion of the line I/O changes, see the python-dev
summary for January 1-15, 2001 at
-\url{http://www.amk.ca/python/dev/2001-01-1.html}.
+\url{http://www.python.org/dev/summary/2001-01-1.html}.
\item A new method, \method{popitem()}, was added to dictionaries to
enable destructively iterating through the contents of a dictionary;