[OE-core] RFE: make the init manager an image feature (again)

[Enrico Scholz]

"Burton, Ross" <ross.burton-ral2JQCrhuEAvxtiuMwx3w at public.gmane.org>
writes:

> more upstream over time will also integrate systemd unit files
> directly.

When in 5 or 10 years everybody switched to systemd and installs its
service files by itself, we can mark the relevant code in the class as
deprecated and remove it.

But now, the oe-core systemd implementation causes redundant implementations
of non trivial code in several packages.


Enrico