OOD logout URL

Currently the logout button on https://rc.uab.edu goes to /logout which will give you 404 not found.

The default shibboleth logout path is /Shibboleth.sso/Logout

Related links:

• https://osc.github.io/ood-documentation/release-2.0/authentication/overview/configure-logout.html?highlight=logout
• https://osc.github.io/ood-documentation/release-2.0/authentication/shibboleth.html#authentication-shibboleth