Removed note about "0" IP address from tutorial.

Tutorial should offer only minimum, necessary, explanation.

docs/intro/tutorial01.txt

@@ -181,10 +181,10 @@ It worked!
 
     .. console::
 
-        $ python manage.py runserver 0:8000
+        $ python manage.py runserver 0.0.0.0:8000
 
-    **0** is a shortcut for **0.0.0.0**. Full docs for the development server
-    can be found in the :djadmin:`runserver` reference.
+    Full docs for the development server can be found in the
+    :djadmin:`runserver` reference.
 
 .. admonition:: Automatic reloading of :djadmin:`runserver`
 

docs/ref/django-admin.txt

@@ -1008,8 +1008,8 @@ separate ports by executing ``django-admin runserver`` more than once.
 
 Note that the default IP address, ``127.0.0.1``, is not accessible from other
 machines on your network. To make your development server viewable to other
-machines on the network, use its own IP address (e.g. ``192.168.2.1``) or
-``0.0.0.0`` or ``::`` (with IPv6 enabled).
+machines on the network, use its own IP address (e.g. ``192.168.2.1``), ``0``
+(shortcut for ``0.0.0.0``), ``0.0.0.0``, or ``::`` (with IPv6 enabled).
 
 You can provide an IPv6 address surrounded by brackets
 (e.g. ``[200a::1]:8000``). This will automatically enable IPv6 support.