web: Display fingerprints in initial setup and add to known_hosts
web: Display fingerprints in initial setup and add to known_hosts

Show real host fingerprint in initial setup and add to known_hosts
so that we can later connect to the host without problems.

We refactor the connectting to another server in PageSetupServer a
bit since we need to reconnect at various stages with different
credentials and keys.

Closes #468

Signed-off-by: Marius Vollmer <dfb09a139f04db0099494605fd3e46839b0a540f@redhat.com>
 * Reworked the code in cockpit-setup.js

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