It prevents data loss while upgrading partition.

Because new s.r.templare requires new Jinja2.

Before, a random password was generated for each group of zopes.

Add a way to takeover remotely.

Why having wrappers of wrappers of wrappers, when we can have simple, readable code?

Used to access directly to VM.

Keep it undocumented, as haproxy config in its current state cannot be
sufficient to get properly configured haproxy/apache processes. It needs
a significant rework before it makes sense to document it.