Backport source links from 3.x.

Existing links have been updated to use the new reST role.  In some
files, I have also made cosmetic changes to the header.
diff --git a/Doc/library/uu.rst b/Doc/library/uu.rst
index fa1477b..1608d41 100644
--- a/Doc/library/uu.rst
+++ b/Doc/library/uu.rst
@@ -1,4 +1,3 @@
-
 :mod:`uu` --- Encode and decode uuencode files
 ==============================================
 
@@ -6,6 +5,9 @@
    :synopsis: Encode and decode files in uuencode format.
 .. moduleauthor:: Lance Ellinghouse
 
+**Source code:** :source:`Lib/uu.py`
+
+--------------
 
 This module encodes and decodes files in uuencode format, allowing arbitrary
 binary data to be transferred over ASCII-only connections. Wherever a file
@@ -22,11 +24,6 @@
 
 This code was contributed by Lance Ellinghouse, and modified by Jack Jansen.
 
-.. seealso::
-
-   Latest version of the `uu module Python source code
-   <http://svn.python.org/view/python/branches/release27-maint/Lib/uu.py?view=markup>`_
-
 The :mod:`uu` module defines the following functions:
 
 
@@ -62,4 +59,3 @@
 
    Module :mod:`binascii`
       Support module containing ASCII-to-binary and binary-to-ASCII conversions.
-