Attribute (OLcfgDbAt:0.1 NAME 'olcDbDirectory') has different definitions in back-ldif and back-bdb: No SINGLE-VALUE in back-ldif.
Looks like a likely bug to reappear when other "common" attributes are added. I suggest that OIDs in the "common" namespace are defined in bconfig.c (in this case with no way to configure the attribute), and that backends that use them put just the OID or attribute name instead of the whole attribute definition in ConfigTable.attribute. Currently that would also apply to: back-bdb: (OLcfgDbAt:0.2 'olcDbIndex'), (OLcfgDbAt:0.3 'olcDbMode') back-ldap: (OLcfgDbAt:0.14 'olcDbURI') -- Hallvard