UTIL: Store UPN suffixes when creating a new subdomain
We used to store UPN suffixes pointer into the domain structure only if
the domain changed, not when a new domain was created. As an effect, the
enterprise principals flag was not enabled unless a domain changed,
preventing logins with enterprise principals.
Resolves:
https://pagure.io/SSSD/sssd/issue/3384
Reviewed-by: Sumit Bose <sbose@redhat.com>
(cherry picked from commit 8718ff9ccd29f6431bfa8630bfa3576b2692c9ee)