In rescue mode let's not establish all sockets, so that we don't end up
starting a lot of additional services automatically.
Instead of pulling in basic.target we now only pull in sysinit.target
which pulls in local-fs.target and swap.target. That way rescue mode has
all the really basic setup around, but normal services are not started
and not autostarted either.
This should help making the boot process a bit easier to explore and
understand for the administrator. The simple idea is that "systemctl
status" now shows a link to documentation alongside the other status and
decriptionary information of a service.
This patch adds the necessary fields to all our shipped units if we have
proper documentation for them.
We finally got the OK from all contributors with non-trivial commits to
relicense systemd from GPL2+ to LGPL2.1+.
Some udev bits continue to be GPL2+ for now, but we are looking into
relicensing them too, to allow free copy/paste of all code within
systemd.
The bits that used to be MIT continue to be MIT.
The big benefit of the relicensing is that closed source code may now
link against libsystemd-login.so and friends.
