- Name the slapd service as ldap (in case it's replaced by a different
LDAP server).
- Allow overriding the default environment variables (preparation for an
actual deployment).

- Use a patch to change the configuration files (instead of fiddling
with sed).
- Don't log the healthcheck requests.

- Replaced phpLDAPadmin with ldap-account-manager as the webui.
- Added nss-pam-ldapd as a test client.