reference the setuptools packaging guide with an advisory

Author: qwcode

source/distributing.rst

@@ -18,6 +18,12 @@ For example, it does not provide guidance or recommendations on selecting
 third-party tools or services such as for documentation, automated
 testing, continuous integration, etc.
 
+For a reference guide on creating projects, see the `Setuptools guide to
+Building and Distributing Packages
+<http://pythonhosted.org/setuptools/setuptools.html>`_, but note that some
+advisory content there may be outdated. In the event of conflicts, prefer the
+advice in the Python Packaging User Guide.
+
 
 Setup for Project Distributors
 ==============================
@@ -46,9 +52,6 @@ In the sections below, we'll reference the `PyPA sample project
 <https://github.com/pypa/sampleproject>`_, which exists as a companion to this
 tutorial.
 
-For more information on creating projects, see the `Setuptools Docs
-<http://pythonhosted.org/setuptools/setuptools.html>`_.
-
 
 Layout
 ------