Remove/refactor command line helpers

[laurivosandi]

In the beginning we tried to configure services with certidude setup service-blah, this approach failed because bits and pieces of the information has to be persistent for example for certificate renewal and in some cases request has to be initiated later (when interface goes up or machine is joined to domain).

Instead now we're using /etc/certidude/client.conf and /etc/certidude/services.conf configuration files. This makes it more manageable also with configuration management software.

In fact in the future we should migrate to /etc/certidude/client.d/blah.conf and /etc/certidude/service.d/blah.conf schema. This makes it easier to reconfigure services with a simple copypastable command instead of having to update fragments of an .ini style file.

So - certidude setup service-blah command either should be removed completely or refactored to generate /etc/certidude/serivced/blah.conf files