Log Message:
Update openldap packages to OpenLDAP 2.4.7 (forced update for db4-4.6.x
support, reported via PR pkg/37745 ).

OpenLDAP 2.4.x brings a lot of new features, including multi-master support,
dynamic configuration and schema changes, automatic reverse group membership,
significant performance improvements, etc.  One of the most noticeable changes
for administrators though is the removal if the slurpd daemon (in favour of
the sync replication mechanism).  Users of slurpd replication should migrate
to sync replication before upgrading to OpenLDAP 2.4.x.