Currently server (HTTP / LDAP) certs are created without a Subject
Alternative Name extension during server install, replica prepare
and host enrolment, a potentially problematic violation of RFC 2818.
Add the hostname as a SAN dNSName when these certs are created.
(Certmonger adds an appropriate request extension when renewing the
certificate, so nothing needs to be done for renewal).
Fixes: https://fedorahosted.org/freeipa/ticket/4970
Reviewed-By: Petr Spacek <pspacek@redhat.com>