Quick-start guide: describe urllib situation

Author: edschofield

docs/quickstart.rst

@@ -101,14 +101,25 @@ be accessed under their Python 3 names and locations in Python 2::
         import xmlrpc.client
         import xmlrpc.server
 
-``urllib`` currently requires explicit imports because the name clashes with that on Python 2::
+``urllib`` currently requires an explicit import because the name clashes with
+that on Python 2 and because Python's syntax does not allow imports of this
+form with a dotted module name after ``as``::
+
+    import future.moves.urllib.parse as urllib.parse
+
+For submodules of ``urllib`` and other packages (like ``http``), this
+alternative form is available::
 
     from future.standard_library import import_
+
     urllib = import_('urllib')
     import_('urllib.parse')
     import_('urllib.request')
     import_('urllib.error')
 
+    response = urllib.request.urlopen('http://mywebsite.com')
+    # etc.
+
 For an explanation of these and other forms of imports from the standard
 library, see :ref:`standard-library-imports`.