Merge branch 'updater-interactive-service-config' into 'stable-3.1'

Updater interactive service config

I hope this is okay for you. Please have a quick look at docs/autoinstall_samples/autoinstall.ini.sample  if that syntax is okay.
This MR closes ispconfig/ispconfig3#4163
and also closes ispconfig/ispconfig3#4050

Tested on Master-Slave and confirmed working on both. See comments.

See merge request !431