LDAP connection issues with TLS (1.3)

Hello We had some issue with the LDAP connection for the password change. After some reverse-engineering we could figure out, that PHP, resp. the `ldap_bind()` function didn't accept the SSL certificate: ``` TLS: peer cert untrusted or revoked (0x42) ``` This is due to the missing hint / link to the certificate authorities. The `ca-certificates` (apt) package is installed, but the LDAP config is missing. We could fix it by adding the following config: ``` cat /etc/ldap/ldap.conf TLS_CACERT /etc/ssl/certs/ca-certificates.crt ``` This will define the CA certificate store to the one provided by the `ca-certificates` Debian package. Alternatively `libldap-common` can be installed, as it will provide the default `/etc/ldap/ldap.conf` as well.