shell: Execute systemctl via pkexec when starting Docker
shell: Execute systemctl via pkexec when starting Docker

So that wheel users can also do it.

Fixes #1317
Reviewed-by: Stef Walter <8a7fbf0f15d3ad982af54ef28f5c117d2494b76c@redhat.com>

sgallagher/cockpit,nmav/cockpit,nmav/cockpit,sgallagher/cockpit,harishanand95/cockpit,arilivigni/cockpit,sub-mod/cockpit,petervo/cockpit,vbatts/cockpit,evol262/cockpit,FireDrunk/cockpit,larskarlitski/cockpit,firebitsbr/cockpit,sub-mod/cockpit,arilivigni/cockpit,dperpeet/cockpit,garrett/cockpit,cockpit-project/cockpit,mvollmer/cockpit,michalskrivanek/cockpit,mvollmer/cockpit,Thermionix/cockpit,kkaempf/cockpit,garrett/cockpit,xhad/cockpit,deryni/cockpit,andreasn/cockpit,martinpitt/cockpit,firebitsbr/cockpit,cockpituous/cockpit,haiyangd/cockpit_view,deryni/cockpit,FireDrunk/cockpit,larskarlitski/cockpit,jscotka/cockpit,deryni/cockpit,netzvieh/cockpit,moraleslazaro/cockpit,arilivigni/cockpit,larskarlitski/cockpit,stefwalter/cockpit,mareklibra/cockpit,larsu/cockpit,deryni/cockpit,zigitax/cockpit,SotolitoLabs/cockpit,jscotka/cockpit,larsu/cockpit,Thermionix/cockpit,zigitax/cockpit,denysvitali/cockpit,denysvitali/cockpit,stefwalter/cockpit,deryni/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,vanloswang/cockpit,Thermionix/cockpit,matobet/cockpit,jscotka/cockpit,mvollmer/cockpit,evol262/cockpit,xhad/cockpit,nmav/cockpit,larsu/cockpit,cockpituous/cockpit,stefwalter/cockpit,Scribery/cockpit,maxamillion/cockpit,larsu/cockpit,moolitayer/cockpit,andreasn/cockpit,larskarlitski/cockpit,dperpeet/cockpit,harishanand95/cockpit,xhad/cockpit,Thermionix/cockpit,cockpituous/cockpit,arilivigni/cockpit,FireDrunk/cockpit,netzvieh/cockpit,dperpeet/cockpit,mareklibra/cockpit,sgallagher/cockpit,moolitayer/cockpit,maxamillion/cockpit,vbatts/cockpit,SotolitoLabs/cockpit,stefwalter/cockpit,mareklibra/cockpit,martinpitt/cockpit,Scribery/cockpit,stefwalter/cockpit,SotolitoLabs/cockpit,garrett/cockpit,jscotka/cockpit,andreasn/cockpit,dperpeet/cockpit,petervo/cockpit,deryni/cockpit,moraleslazaro/cockpit,zigitax/cockpit,Armstrong1992/cockpit,firebitsbr/cockpit,mareklibra/cockpit,harishanand95/cockpit,netzvieh/cockpit,jscotka/cockpit,vanloswang/cockpit,sub-mod/cockpit,Thermionix/cockpit,jscotka/cockpit,zigitax/cockpit,arilivigni/cockpit,Scribery/cockpit,petervo/cockpit,moraleslazaro/cockpit,kkaempf/cockpit,garrett/cockpit,kkaempf/cockpit,denysvitali/cockpit,maxamillion/cockpit,sgallagher/cockpit,larskarlitski/cockpit,moolitayer/cockpit,andreasn/cockpit,sgallagher/cockpit,harishanand95/cockpit,maxamillion/cockpit,SotolitoLabs/cockpit,fridex/cockpit,petervo/cockpit,Scribery/cockpit,darioajr/cockpit,vbatts/cockpit,darioajr/cockpit,haiyangd/cockpit_view,garrett/cockpit,arilivigni/cockpit,martinpitt/cockpit,Armstrong1992/cockpit,stefwalter/cockpit,evol262/cockpit,firebitsbr/cockpit,nmav/cockpit,michalskrivanek/cockpit,moolitayer/cockpit,michalskrivanek/cockpit,SotolitoLabs/cockpit,netzvieh/cockpit,fridex/cockpit,dperpeet/cockpit,darioajr/cockpit,stefwalter/cockpit,denysvitali/cockpit,xhad/cockpit,fridex/cockpit,harishanand95/cockpit,firebitsbr/cockpit,petervo/cockpit,Scribery/cockpit,haiyangd/cockpit_view,moraleslazaro/cockpit,sub-mod/cockpit,moolitayer/cockpit,andreasn/cockpit,cockpit-project/cockpit,cockpituous/cockpit,vanloswang/cockpit,andreasn/cockpit,vbatts/cockpit,vanloswang/cockpit,petervo/cockpit,Armstrong1992/cockpit,FireDrunk/cockpit,matobet/cockpit,michalskrivanek/cockpit,mareklibra/cockpit,dperpeet/cockpit,michalskrivanek/cockpit,larsu/cockpit,vbatts/cockpit,evol262/cockpit,petervo/cockpit,martinpitt/cockpit,matobet/cockpit,deryni/cockpit,sgallagher/cockpit,moraleslazaro/cockpit,michalskrivanek/cockpit,cockpit-project/cockpit,haiyangd/cockpit_view,denysvitali/cockpit,mvollmer/cockpit,matobet/cockpit,Armstrong1992/cockpit,vanloswang/cockpit,fridex/cockpit,harishanand95/cockpit,cockpituous/cockpit,evol262/cockpit,martinpitt/cockpit,larskarlitski/cockpit,larskarlitski/cockpit,arilivigni/cockpit,SotolitoLabs/cockpit,mareklibra/cockpit,SotolitoLabs/cockpit,darioajr/cockpit,mvollmer/cockpit,matobet/cockpit,vanloswang/cockpit,mareklibra/cockpit,sgallagher/cockpit,larsu/cockpit,Armstrong1992/cockpit,kkaempf/cockpit,xhad/cockpit,dperpeet/cockpit,matobet/cockpit,andreasn/cockpit,moraleslazaro/cockpit,Scribery/cockpit,darioajr/cockpit,xhad/cockpit,michalskrivanek/cockpit,zigitax/cockpit,evol262/cockpit,netzvieh/cockpit,sub-mod/cockpit,kkaempf/cockpit,harishanand95/cockpit,fridex/cockpit,nmav/cockpit,haiyangd/cockpit_view,fridex/cockpit,Thermionix/cockpit,cockpit-project/cockpit,Scribery/cockpit,vbatts/cockpit,FireDrunk/cockpit,maxamillion/cockpit,xhad/cockpit,vanloswang/cockpit,cockpituous/cockpit,netzvieh/cockpit