Toggling the CDN support for a system in the webui/via xmlrpc should affect what the system does when using up2date or yum.
To Test: * get yourself a client that supports CDN (say, the latest rhel 4) * register the system * Use the SDC to disable/enable location aware downloads * watch /var/log/rhn/rhn.log on rhnxml to see what the detected cdn_pref is. * verify that you are redirected or not, depending on what you toggled
verified on dev
Pushed to prod on 5/15/09.