port envoy to systemd-206 slices support
envoyd: cleanuo output
envoyd: fix slice (envoy-%s.scope)
envoyd: more cleanups
support envoy run as user again
Merge remote-tracking branch 'origin/systemd'

* origin/systemd:
  support envoy run as user again
  envoyd: more cleanups
  envoyd: fix slice (envoy-%s.scope)
  envoyd: cleanuo output
  port envoy to systemd-206 slices support
make envoy-monitor.scope unique between users