https://bugs.openldap.org/show_bug.cgi?id=10137
--- Comment #3 from kero renault.cle@gmail.com --- Here's a patch (in git-format-patch format, per the Guidelines for Contributing) that changes the code to allow users to define MDB_IDL_LOGN.
(I haven't provided a Notice of Origin nor Rights Statement, as, per the Guidelines for Contributing, this patch doesn't represent "significant blocks of new code (10 lines or greater)." It's a one-line change.)
Thank you very much, please tell me if you need anything else.