Rebase to latest production branch

I confirm that using the fix published in our mirror and proposed upstream, it now works!

There is an issue in the pgbouncer puppet module [1]
I'm fixing it [2], checking it works [3]
I opened the issue upstream.
I also opened a PR to fix it upstream [4]

Branch diff to production branch

Remove dest_db as the source and destination names are the same

As mentioned:

• add the missing destination db cluster port (that would have been a source of connection failures)
• explicit all actual existing pgbouncer options (this diff now gives the same output as grep -v '^;' /etc/pgbouncer/pgbouncer.ini)

Looks good for a first draft.

Plug diff to production

Rebase on latest production branch and plug diff to branch

Rebase and plug to production branch