I tried 4->5->your proposed 5.1 and ended up with:
olcDatabase: {0}config olcAccess: {0}to * by dn.exact=gidNumber=0+uidNumber=0,... olcAccess: {0}to * by dn.exact=gidNumber=0+uidNumber=0,...
I tried 4->5->your proposed 5.1 and ended up with:
olcDatabase: {0}config gidNumber= 0+uidNumber= 0,... gidNumber= 0+uidNumber= 0,...
olcAccess: {0}to * by dn.exact=
olcAccess: {0}to * by dn.exact=