[Bug 571057] [NEW] slapd 2.4.21-0ubuntu5 corrupts olcDatabase={-1}frontend.ldif with duplicate olcAccess lines (again)

Public bug reported: Bug 526230 is back. I had slapd 2.4.21-0ubuntu4 installed, then apt-get dist-upgrade, which pulled in slapd 2.4.21-0ubuntu5. This modified /etc/ldap/slapd.d/cn=config/olcDatabase={-1}frontend.ldif by adding duplicate olcAccess lines without any {0} index prefix, causing

[Bug 571057] [NEW] slapd 2.4.21-0ubuntu5 corrupts olcDatabase={-1}frontend.ldif with duplicate olcAccess lines (again)

Public bug reported: Bug 526230 is back. I had slapd 2.4.21-0ubuntu4 installed, then apt-get dist-upgrade, which pulled in slapd 2.4.21-0ubuntu5. This modified /etc/ldap/slapd.d/cn=config/olcDatabase={-1}frontend.ldif by adding duplicate olcAccess lines without any {0} index prefix, causing