Add "Using Python on Windows" document, by Robert Lehmann.
Written for GHOP.
diff --git a/Doc/distutils/extending.rst b/Doc/distutils/extending.rst
index a2930c7..972ff02 100644
--- a/Doc/distutils/extending.rst
+++ b/Doc/distutils/extending.rst
@@ -1,4 +1,4 @@
-.. _extending:
+.. _extending-distutils:
 
 *******************
 Extending Distutils