The core authentication code in WeBWorK hasn't changed in quite a while. It looks like there have been some minor tweaks to the shibboleth module, but no significant work since 2014, so that document is probably the most recent thing that has been produced.
If you run into issues you can post your questions here, and hopefully people who are familiar with the module are able to respond.
Installation
shibboleth
This forum has a limit to the number of forum postings you can make in a given time period - this is currently set at 5 posting(s) in 1 day