1 - Update the Wiki
When Selected Goto the bottom to the Shibboleth Seettings.
Below is a table of the options and what they do.
Below are the files that were modified to enable Shibboleth Authentication;
2 - Update Shibboleth
The other thing you will need to do is update your Shibboleth Service Providers AAP (Attribute Assertion Policy) AAP.XML.
Below are the Attributes required by the Tikiwiki Auth and the required Header values;