There seems to be an issue with proxy config information not
getting migrated properly from rhn_register.
Symptons seem to be that up2date ends up with
up2dateProxyAuth enabled, but no ProxyUser or ProxyPasswd
set, eventually causing a traceback.
1) the code that uses these values should verify sanity
2) not sure yet how these bogus values got set, but the
code that migrates the proxy settings from rhn_register
look most suspicious.
no longer applicable with current code base.