* instead of using the 'base' profile and letting other profiles override,
  we should have even more flexibilty to take parts from different profiles.
* fix crossconcerns: some procedures could be about _what_ (desktop,server),
  others are about _how_ (autodetection, asking user,...) (profile vs...
  'mode' ?)
* make some sensible default profiles (eg desktop, server, ...)
* make it work