This has irked me for a while. For me network configuration is the stuff
we store on disk in configuration file. And networkd then *applies* the
configuration. But the units so far claimed that networkd was the
"configuration" itself. Which I guess might make sense to some, but to
me sounds a bit unprecise. Let's clean this up, and call what networkd
is doing "Network Management".
systemd-networkd.socket can re-start systemd-networkd.service in
shutdown and by doing this even stop shutdown.target leaving the
system in halfway-down state.
Fixes#4955.
Usually we try to properly uppercase first characters in the
description, do so here, too. Also, keep it close to the string used in
systemd-networkd.service.
