Fixing broken links in doc, part 4: some more breaks and redirects
diff --git a/Doc/faq/extending.rst b/Doc/faq/extending.rst
index 2aca607..ccd8b28 100644
--- a/Doc/faq/extending.rst
+++ b/Doc/faq/extending.rst
@@ -53,7 +53,7 @@
If you need to interface to some C or C++ library for which no Python extension
currently exists, you can try wrapping the library's data types and functions
with a tool such as `SWIG <http://www.swig.org>`_. `SIP
-<http://www.riverbankcomputing.co.uk/software/sip/>`__, `CXX
+<http://www.riverbankcomputing.co.uk/software/sip/intro>`__, `CXX
<http://cxx.sourceforge.net/>`_ `Boost
<http://www.boost.org/libs/python/doc/index.html>`_, or `Weave
<http://docs.scipy.org/doc/scipy-dev/reference/tutorial/weave.html>`_ are also