access to createtimestamp modifytimestamp ... in openldap version 2.2

[Alain Abbas <aa@libertech.fr>]

Hello
with openldap 2.0.x attibutes *timestamp was described in core .schema
it was easy to get access to this attributes to modify dsa-operation tag
how in openldap 2.2 have access to these attributes for search (for
client sync).

Thanks