Add a few missing source links from 2.7 and harmonize lib docs headers
diff --git a/Doc/library/urllib.parse.rst b/Doc/library/urllib.parse.rst
index c77a679..aece714 100644
--- a/Doc/library/urllib.parse.rst
+++ b/Doc/library/urllib.parse.rst
@@ -12,6 +12,10 @@
pair: URL; parsing
pair: relative; URL
+**Source code:** :source:`Lib/urllib/parse.py`
+
+--------------
+
This module defines a standard interface to break Uniform Resource Locator (URL)
strings up in components (addressing scheme, network location, path etc.), to
combine the components back into a URL string, and to convert a "relative URL"