saml_base must be a subpath of saml_auth in client installer
If the authenticated path doesn't reside under saml_base (which
defaults to /) then mod_auth_mellon can't find the IdP.
https://fedorahosted.org/ipsilon/ticket/163
Signed-off-by: Rob Crittenden <rcritten@redhat.com>
Reviewd-by: Patrick Uiterwijk <puiterwijk@redhat.com>