this is just a heads up that the AuthorizedKeysCommand functionality,
which is necessary for the user keys part of OpenSSH integration in SSSD
and was previously available in OpenSSH packages only in few Linux
distros (Fedora, RHEL, Madriva), is now part of upstream OpenSSH as of
version 6.2 (see <http://www.openssh.com/txt/release-6.2
>). Once this
version is adopted by other Linux distros (and other OSes), SSSD OpenSSH
integration will fully work in them as well.