[one-users] two authentication methods in Sunstone

[knawnd]

Hello!

I wonder if it is possible to enable two authentication methods in Sunstone?
As far as I understand from [1] currently only single auth method is 
supported.
I would like to implement the following: first try to use x509 auth 
method and if it fails then try the next one listed in 
/etc/one/sunstone-server.conf e.g. like
:auth: x509,sunstone

i.e. if user doesn't have a proper x509 certs imported in his browser 
then he still can be authenticated with username/password.

Regards,
Nikolay.

[1] http://opennebula.org/documentation:rel4.2:suns_auth