Improve the documentation for CAS setup

[miniwark]

There is a documentation to setup CAS with Knowage at Readthedocs but i's a bit lacking and confusing. I have a few questions that need clarifications:

• where to download the cas.war file ? (at Apereo.org ?)
• did this install/setup the CAS client or a CAS server ? (seem like it's the later with a CAS overlay)
• how to setup the client only ? (if a CAS server is already available)
• witch client can be used with Knowage (only the legacy Yale.edu client ?)
• where to download the recommended CAS client ? (this one ?)

[github-actions[bot]]

This issue is stale because it is related to an old version or it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days.

[github-actions[bot]]

This issue was closed because it has been stalled for 5 days with no activity.