This allows enabling replication later without requiring a mariadb restart.
For now, nothing passes the internal server-id instance parameter, so
replication is not.

so that build will not fail if the directory was left during previous
builds.

The promise is-process-older-than-dependency-set still fails
if necessary, but does not kill the zope anymore.

  Using ServerAliases %{SERVER_NAME} would not cause a change of URL to something
  diferent them it was requested.

  Include software-type in order to use multiple forms/schemas for
     the same software-type, like simplified or advanced.
  Include shared to include schemas for slaves.