Updates for Chef 12 and Chef.io TLD

New key and apt repo for Packagecloud.io. Update URL from getchef.com to
chef.io.

Change-Id: I225590d3410524480ce12aabe8a4805ec16b005e

doc/common/section_user-data.xml

@@ -9,7 +9,7 @@
         user data or <package>cloud-init</package> to automatically
         configure instances at boot time. You might want to install
         some packages, start services, or manage your instance by
-        using a <link xlink:href="http://puppetlabs.com/puppet/puppet-open-source">Puppet</link> or <link xlink:href="http://getchef.com">Chef</link> server.</para>
+        using a <link xlink:href="http://puppetlabs.com/puppet/puppet-open-source">Puppet</link> or <link xlink:href="https://www.chef.io/openstack">Chef</link> server.</para>
     <simplesect>
         <title>User data</title>
         <para>User data is the mechanism by which a user can pass
@@ -179,46 +179,80 @@ puppet:
                 >doc/examples/cloud-config/chef.txt</link> and
             intended for use in an Ubuntu image, adds the Chef apt
             repository, installs Chef, connects to a Chef server at
-                <literal>https://chefserver.example.com:4000</literal>,
+                <literal>https://chefserver.example.com/organizations/myorg/</literal>,
             and installs Apache:</para>
         <programlisting>#cloud-config
 apt_sources:
- - source: "deb http://apt.opscode.com/ $RELEASE-0.10 main"
+ - source: "deb https://packagecloud.io/chef/ stable main"
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 chef:
  install_type: "packages"
- server_url: "https://chefserver.example.com:4000"
+ server_url: "https://chefserver.example.com/organizations/myorg/"
  node_name: "your-node-name"
  environment: "production"
  validation_name: "yourorg-validator"