Unfortunately it seems to introduce a bug. If I *just* add or delete a
value all is OK, but if I delete one value and add another in the same
LDAP operation the new value does not get indexed. The value is in the
entry, but it cannot be searched for. Further, it cannot be deleted
(as it is 'not there') yet it can be added again, leading to multiple
identical values in the entry!
This only happens on *large* groups where the value being added would
sort to the end of the list of values. I don't know how large the group
has to be: 3 is not enough, and 10,000 is. My test case has a group that
starts with 10,000 members inserted in numerical order: