The proxy config property names have changed but the recipes section of the user guide did not reflect the new names. The name changes are as follows:

+----------------------+------------------+
| Old name             | New Name         |
+======================+==================+
| proxy_url            | proxy_host       |
+----------------------+------------------+
| proxy_user           | proxy_username   |
+----------------------+------------------+
| proxy_pass           | proxy_password   |
+----------------------+------------------+

Keep in mind these are changes to the configuration itself. In the CLI, the only change is proxy_url -> proxy_host.

Additionally, the location of the file in which to make these changes has moved from /usr/lib/pulp to /etc/pulp/server.

In addition to updating the recipes page, the release notes need to be updated to indicate the user's old configuration needs to be redone.