I saw a RFE for SSO with Kerberos, here is another RFE for SSO with HTTP headers. A WebSSO product can send HTTP headers to web application, and the application just have to read the HTTP header to get user's login. Commercial products like Novell or Siteminder work like this. In Open Source, you can use LemonLDAP::NG to do it: http://lemonldap-ng.org
Spacewalk project as an upstream for Red Hat Satellite 5 product is going to be End Of Life on May 31 2020. Spacewalk 2.10 has been released as the last release of this project. https://github.com/spacewalkproject/spacewalk/wiki/ReleaseNotes210 Any new feature will not be included therefore closing remaining RFEs to set expectations properly.