template-initconfig is missing

In 20.04

When I run setup-ds.pl, it always errors out thus:

```
Could not open the script template file '/etc/dirsrv/config/template-initconfig'. Error: No such file or directory
```

Going by this page: https://manpages.ubuntu.com/manpages/focal/man5/template-initconfig.5.html

… it seems that this file is meant to be included in the package but just isn’t there:

```
> apt-file show 389-ds-base | grep etc
389-ds-base: /etc/default/389-ds-base
389-ds-base: /etc/dirsrv/config/certmap.conf
389-ds-base: /etc/dirsrv/config/ldap-agent.conf
389-ds-base: /etc/dirsrv/config/slapd-collations.conf
389-ds-base: /etc/dirsrv/schema/99user.ldif
```

Thank you for your time!