Comment 16 for bug 1959054

Here is a little reproducer I'm using.

apt update
DEBIAN_FRONTEND=noninteractive apt-get -y --allow-unauthenticated -o Dpkg::Options::='--force-confold' install slapd ldap-utils

debconf-set-selections -v << EOF
slapd slapd/domain string example.com
slapd shared/organization string example
slapd slapd/password1 password secret
slapd slapd/password2 password secret
EOF

rm -rf /var/backups/*slapd* /var/backups/unknown*ldapdb

# note slapd pid

pidof slapd

dpkg-reconfigure -fnoninteractive -pcritical slapd

# check if slapd was restarted
pidof slapd

# also, this command should work
# ldapwhoami -x -D cn=admin,dc=example,dc=com -w secret
dn:cn=admin,dc=example,dc=com

I'm attaching set -x outputs from all slapd maintainer scripts during the reconfigure, in each case (proposed and release)