Gavin Henry writes:
What's the best practice for choosing the numbers in OLcfgOvAt:14.1 Above is taken from translucent.c
Not sure what you mean. OLcfgOvAt:14.1 is an attribute type defined in translucent.c, you shouldn't take OIDs below it.
If you want to add another config attribute to translucent, grab OLcfgOvAt:14.3 - the first free OLcfgOvAt:14.* OID in translucent.c. If you want an OID arc for another overlay/backend in OpenLDAP, add a new OID arc in the OID registry in bconfig.c.