Running openldap-2.4.31 on Ubuntu 14.04.1 LTS compiled with gnutls.
I strongly advise you to get a current OpenLDAP build, linked to OpenSSL, rather than wasting time on the broken bits shipped by Ubuntu.
--Quanah -- Quanah Gibson-Mount Server Architect Zimbra, Inc. -------------------- Zimbra :: the leader in open source messaging and collaboration