from successfully deleting an entry when "account" is
the STRUCTURAL objectclass used for users and machines.
"account" is used each time the user entry is in /etc/passwd
and we have only the samba attributes in ldap, as well
as for rfc2307(bis) standard based directories.
(This used to be commit e6399f1aa1c98d2d6e700245bb95c84f7e173236)