shell: Fix null dereference on server page when hostname proxy is slow
shell: Fix null dereference on server page when hostname proxy is slow

Closes #2459
Reviewed-by: Marius Vollmer <bb11c6e942c5cc765df5f04da146b3198127a7a3@redhat.com>

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