Not really satisfied with the HA split but let's just say it's a
work in progress...

this pull request will fix the comment as suggested in #949

While there, improve the consistency of the cron descriptions
and service messages.

We'll go the long way here, bumping the values first before making
them configurable in the next iteration.

Suggested by: @fabianfrz

Sync PHP config and PHP directly after installation of the new package
in order to avoid errors for missing files or modules.