systemd: refactor and add latest commands (#6250)

* Order systemctl commands alphabetically

Simplifying the plugin maintenance.
Signed-off-by: Petr Šabata <contyk@redhat.com>

* Include the latest systemctl commands

Based on systemd-233.  I'm still keeping the old, now unsupported
commands for backwards compatibility as well.
Signed-off-by: Petr Šabata <contyk@redhat.com>

* Add daemon-reload (#3701)

Closes #3701
Co-authored-by: Javier Tia <javier.tia@gmail.com>

plugins/systemd/systemd.plugin.zsh

 user_commands=(
-  list-units is-active status show help list-unit-files
-  is-enabled list-jobs show-environment cat list-timers)
+  cat
+  get-default
+  help
+  is-active
+  is-enabled
+  is-failed
+  is-system-running
+  list-dependencies
+  list-jobs
+  list-sockets
+  list-timers
+  list-unit-files
+  list-units
+  show
+  show-environment
+  status)
 
 sudo_commands=(
-  start stop reload restart try-restart isolate kill
-  reset-failed enable disable reenable preset mask unmask
-  link load cancel set-environment unset-environment
-  edit)
+  add-requires
+  add-wants
+  cancel
+  daemon-reexec
+  daemon-reload
+  default
+  disable
+  edit
+  emergency
+  enable
+  halt
+  hibernate
+  hybrid-sleep
+  import-environment
+  isolate
+  kexec
+  kill
+  link
+  list-machines
+  load
+  mask
+  poweroff
+  preset
+  preset-all
+  reboot
+  reenable
+  reload
+  reload-or-restart
+  reset-failed
+  rescue
+  restart
+  revert
+  set-default
+  set-environment
+  set-property
+  start
+  stop
+  suspend
+  switch-root
+  try-reload-or-restart
+  try-restart
+  unmask
+  unset-environment)
 
 for c in $user_commands; do; alias sc-$c="systemctl $c"; done
 for c in $sudo_commands; do; alias sc-$c="sudo systemctl $c"; done