Let me rephrase that question... searching the cvsweb and
openldap-commit archives, it looks like instead of being partially
removed, that the auditlog overlay was only partially incorporated (on
June 7, 2005) and has not been moved into general use.
That's what I meant.
Is there a problem with using it?
I don't know. Possibly, it was intended for contrib/slapd-modules/ rather
than servers/slapd/overlays/ (that's where some of the overlays of little
use that are currently in servers/slapd/overlays/ may end-up); someone
else might have more precise answers.