Fix lots of broken links in the docs, found by Sphinx' external link checker.
diff --git a/Doc/howto/advocacy.rst b/Doc/howto/advocacy.rst
index 8b5b11c..d71e1ec 100644
--- a/Doc/howto/advocacy.rst
+++ b/Doc/howto/advocacy.rst
@@ -346,7 +346,7 @@
    wasn't written commercially.  This site presents arguments that show how open
    source software can have considerable advantages over closed-source software.
 
-http://sunsite.unc.edu/LDP/HOWTO/mini/Advocacy.html
+http://www.faqs.org/docs/Linux-mini/Advocacy.html
    The Linux Advocacy mini-HOWTO was the inspiration for this document, and is also
    well worth reading for general suggestions on winning acceptance for a new
    technology, such as Linux or Python.  In general, you won't make much progress
diff --git a/Doc/howto/curses.rst b/Doc/howto/curses.rst
index 9cbc827..1e1e2f7 100644
--- a/Doc/howto/curses.rst
+++ b/Doc/howto/curses.rst
@@ -52,7 +52,7 @@
 No one has made a Windows port of the curses module.  On a Windows platform, try
 the Console module written by Fredrik Lundh.  The Console module provides
 cursor-addressable text output, plus full support for mouse and keyboard input,
-and is available from http://effbot.org/efflib/console.
+and is available from http://effbot.org/zone/console-index.htm.
 
 
 The Python curses module
@@ -432,5 +432,5 @@
 If you write an interesting little program, feel free to contribute it as
 another demo.  We can always use more of them!
 
-The ncurses FAQ: http://dickey.his.com/ncurses/ncurses.faq.html
+The ncurses FAQ: http://invisible-island.net/ncurses/ncurses.faq.html
 
diff --git a/Doc/howto/regex.rst b/Doc/howto/regex.rst
index 2cd83d4..2f085e5 100644
--- a/Doc/howto/regex.rst
+++ b/Doc/howto/regex.rst
@@ -367,8 +367,8 @@
 Python distribution.  It allows you to enter REs and strings, and displays
 whether the RE matches or fails. :file:`redemo.py` can be quite useful when
 trying to debug a complicated RE.  Phil Schwartz's `Kodos
-<http://www.phil-schwartz.com/kodos.spy>`_ is also an interactive tool for
-developing and testing RE patterns.
+<http://kodos.sourceforge.net/>`_ is also an interactive tool for developing and
+testing RE patterns.
 
 This HOWTO uses the standard Python interpreter for its examples. First, run the
 Python interpreter, import the :mod:`re` module, and compile a RE::
diff --git a/Doc/howto/unicode.rst b/Doc/howto/unicode.rst
index fb84df7..6488144 100644
--- a/Doc/howto/unicode.rst
+++ b/Doc/howto/unicode.rst
@@ -210,10 +210,6 @@
 to reading the Unicode character tables, available at
 <http://www.cs.tut.fi/~jkorpela/unicode/guide.html>.
 
-Roman Czyborra wrote another explanation of Unicode's basic principles; it's at
-<http://czyborra.com/unicode/characters.html>.  Czyborra has written a number of
-other Unicode-related documentation, available from <http://www.cyzborra.com>.
-
 Two other good introductory articles were written by Joel Spolsky
 <http://www.joelonsoftware.com/articles/Unicode.html> and Jason Orendorff
 <http://www.jorendorff.com/articles/unicode/>.  If this introduction didn't make
@@ -490,7 +486,7 @@
 
 Marc-André Lemburg gave a presentation at EuroPython 2002 titled "Python and
 Unicode".  A PDF version of his slides is available at
-<http://www.egenix.com/files/python/Unicode-EPC2002-Talk.pdf>, and is an
+<http://downloads.egenix.com/python/Unicode-EPC2002-Talk.pdf>, and is an
 excellent overview of the design of Python's Unicode features.
 
 
@@ -677,7 +673,7 @@
 
 The PDF slides for Marc-André Lemburg's presentation "Writing Unicode-aware
 Applications in Python" are available at
-<http://www.egenix.com/files/python/LSM2005-Developing-Unicode-aware-applications-in-Python.pdf>
+<http://downloads.egenix.com/python/LSM2005-Developing-Unicode-aware-applications-in-Python.pdf>
 and discuss questions of character encodings as well as how to internationalize
 and localize an application.
 
diff --git a/Doc/howto/urllib2.rst b/Doc/howto/urllib2.rst
index dc20b02..dfd7258 100644
--- a/Doc/howto/urllib2.rst
+++ b/Doc/howto/urllib2.rst
@@ -8,7 +8,7 @@
 
     There is an French translation of an earlier revision of this
     HOWTO, available at `urllib2 - Le Manuel manquant
-    <http://www.voidspace/python/articles/urllib2_francais.shtml>`_.
+    <http://www.voidspace.org.uk/python/articles/urllib2_francais.shtml>`_.