`c->cpu_sched_reset_on_fork` is serialized using
`exec-context-cpu-sched-reset-on-fork` and
`exec-context-cpu-scheduling-reset-on-fork`. Let's keep only the second one, to
serialize the value only if `cpu_sched_set` is true.
Let's not complain about various valid loader.conf settings we more
recently added. At the same time let's remove the half-assed userspace
parsers for the fields we actually do support but don't actually really
care about in userspace. There's really no point in storing strings away
that we are not using at all, hence just don#t.
Fixes: #31487
By default socat open a separate r/w channel for each specified address,
and terminates the connection after .5s from receiving EOF on _either_
side. And since one side of that connection is an empty stdin, we reach
that EOF pretty quickly. Let's avoid this by using socat in
"reversed unidirectional" mode, where the first address is used only for
writing, and the second one is used only for reading.
Addresses:
- https://github.com/systemd/systemd/issues/31500
- https://github.com/systemd/systemd/issues/31493
Follow-up for 3456c89ac2.
