docker: Track the cgroups that come in properly
docker: Track the cgroups that come in properly

Various versions of Docker and systemd have different cgroup
names. We figure out which ones we have, and how to assign them
to different containers rather than assuming they're in a specific
format.

Reviewed-by: Dominik Perpeet <f7830b2723a5db4fc185058b06cfab4b89a38da9@redhat.com>

mvollmer/cockpit,martinpitt/cockpit,larskarlitski/cockpit,sgallagher/cockpit,sgallagher/cockpit,petervo/cockpit,xhad/cockpit,petervo/cockpit,deryni/cockpit,larskarlitski/cockpit,garrett/cockpit,andreasn/cockpit,martinpitt/cockpit,petervo/cockpit,martinpitt/cockpit,mvollmer/cockpit,moraleslazaro/cockpit,deryni/cockpit,deryni/cockpit,cockpituous/cockpit,andreasn/cockpit,moraleslazaro/cockpit,dperpeet/cockpit,mareklibra/cockpit,cockpit-project/cockpit,stefwalter/cockpit,Scribery/cockpit,michalskrivanek/cockpit,sgallagher/cockpit,michalskrivanek/cockpit,SotolitoLabs/cockpit,SotolitoLabs/cockpit,dperpeet/cockpit,andreasn/cockpit,stefwalter/cockpit,stefwalter/cockpit,Scribery/cockpit,SotolitoLabs/cockpit,dperpeet/cockpit,cockpituous/cockpit,garrett/cockpit,SotolitoLabs/cockpit,harishanand95/cockpit,arilivigni/cockpit,stefwalter/cockpit,Scribery/cockpit,arilivigni/cockpit,larsu/cockpit,harishanand95/cockpit,vanloswang/cockpit,larskarlitski/cockpit,harishanand95/cockpit,Scribery/cockpit,xhad/cockpit,mareklibra/cockpit,xhad/cockpit,xhad/cockpit,sgallagher/cockpit,SotolitoLabs/cockpit,vanloswang/cockpit,mareklibra/cockpit,andreasn/cockpit,moraleslazaro/cockpit,arilivigni/cockpit,andreasn/cockpit,cockpit-project/cockpit,harishanand95/cockpit,mareklibra/cockpit,petervo/cockpit,michalskrivanek/cockpit,petervo/cockpit,moraleslazaro/cockpit,andreasn/cockpit,larsu/cockpit,sgallagher/cockpit,cockpit-project/cockpit,martinpitt/cockpit,mvollmer/cockpit,michalskrivanek/cockpit,martinpitt/cockpit,cockpit-project/cockpit,mvollmer/cockpit,larsu/cockpit,deryni/cockpit,larsu/cockpit,mareklibra/cockpit,petervo/cockpit,arilivigni/cockpit,vanloswang/cockpit,SotolitoLabs/cockpit,arilivigni/cockpit,Scribery/cockpit,petervo/cockpit,michalskrivanek/cockpit,harishanand95/cockpit,michalskrivanek/cockpit,larskarlitski/cockpit,cockpituous/cockpit,xhad/cockpit,dperpeet/cockpit,vanloswang/cockpit,dperpeet/cockpit,sgallagher/cockpit,xhad/cockpit,stefwalter/cockpit,Scribery/cockpit,SotolitoLabs/cockpit,Scribery/cockpit,larskarlitski/cockpit,harishanand95/cockpit,moraleslazaro/cockpit,dperpeet/cockpit,cockpituous/cockpit,arilivigni/cockpit,garrett/cockpit,larsu/cockpit,moraleslazaro/cockpit,andreasn/cockpit,cockpituous/cockpit,larskarlitski/cockpit,cockpit-project/cockpit,vanloswang/cockpit,larsu/cockpit,harishanand95/cockpit,sgallagher/cockpit,larskarlitski/cockpit,stefwalter/cockpit,cockpituous/cockpit,vanloswang/cockpit,garrett/cockpit,vanloswang/cockpit,michalskrivanek/cockpit,moraleslazaro/cockpit,mareklibra/cockpit,deryni/cockpit,deryni/cockpit,mvollmer/cockpit,mareklibra/cockpit,garrett/cockpit,stefwalter/cockpit,xhad/cockpit,arilivigni/cockpit,deryni/cockpit,dperpeet/cockpit