Make /etc/httpd/alias world readable & executable
    
    The directory /etc/httpd/alias contains public key material. It must be
    world readable and executable, so any client can read public certs.
    
    Note: executable for a directory means, that a process is allowed to
    traverse into the directory.
    
    Fixes: https://pagure.io/freeipa/issue/7594
    Signed-off-by: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Tibor Dudlak <tdudlak@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>