https://bugs.openldap.org/show_bug.cgi?id=9367
--- Comment #3 from Howard Chu hyc@openldap.org --- I noted libsodium because it's a complete crypto library. libargon2 is only a password hasher and as such is useless for database encryption.
Anyway it doesn't matter for the OpenLDAP build since it's only used in sample code, not an intrinsic part of LMDB or OpenLDAP.