Fix network info for docker containers running with --net=host.
Fix network info for docker containers running with --net=host.

Docker still reports a loop device for these. Need to check for
more than one device to mark network as available.

guoshimin/cadvisor,IFTTT/cadvisor,dchen1107/cadvisor,atyenoria/cadvisor,erSitzt/cadvisor,ncdc/cadvisor,aivarasko/cadvisor,mangalaman93/cadvisor,mangalaman93/cadvisor,erSitzt/cadvisor,takecy/cadvisor,shilpamayanna/cadvisor,normanjoyner/cadvisor,aivarasko/cadvisor,carmark/cadvisor,feiskyer/cadvisor,jzaefferer/cadvisor,megamsys/cadvisor,bing6/cadvisor,linux-on-ibm-z/cadvisor,difro/cadvisor,shilpamayanna/cadvisor,IFTTT/cadvisor,BrickXu/cadvisor,derekwaynecarr/cadvisor,timstclair/cadvisor,Snorch/cadvisor,ainsleyc/cadvisor,kmicheal/cadvisor,normanjoyner/cadvisor,guoshimin/cadvisor,feiskyer/cadvisor,aivarasko/cadvisor,ncdc/cadvisor,kmicheal/cadvisor,Snorch/cadvisor,derekwaynecarr/cadvisor,jhjeong-kr/cadvisor,IFTTT/cadvisor,jhjeong-kr/cadvisor,dchen1107/cadvisor,BrickXu/cadvisor,f0/cadvisor,f0/cadvisor,jzaefferer/cadvisor,BrickXu/cadvisor,vishh/cadvisor,morpheyesh/cadvisor,timstclair/cadvisor,linux-on-ibm-z/cadvisor,erSitzt/cadvisor,difro/cadvisor,carmark/cadvisor,afein/cadvisor,hzy001/cadvisor,dchen1107/cadvisor,ainsleyc/cadvisor,hzy001/cadvisor,difro/cadvisor,jimmidyson/cadvisor,bowlofstew/cadvisor,jhjeong-kr/cadvisor,erSitzt/cadvisor,bing6/cadvisor,jhjeong-kr/cadvisor,f0/cadvisor,derwolfe/cadvisor,derekwaynecarr/cadvisor,ncdc/cadvisor,bing6/cadvisor,Snorch/cadvisor,CrazyJvm/cadvisor,atyenoria/cadvisor,vishh/cadvisor,atyenoria/cadvisor,c-st/cadvisor,CrazyJvm/cadvisor,hacpai/cadvisor,jimmidyson/cadvisor,anarcher/cadvisor,pwittrock/cadvisor,hacpai/cadvisor,dchen1107/cadvisor,vishh/cadvisor,derwolfe/cadvisor,derekwaynecarr/cadvisor,guoshimin/cadvisor,takecy/cadvisor,f0/cadvisor,afein/cadvisor,c-st/cadvisor,feiskyer/cadvisor,bowlofstew/cadvisor,hacpai/cadvisor,whosthatknocking/cadvisor,whosthatknocking/cadvisor,jzaefferer/cadvisor,erSitzt/cadvisor,mangalaman93/cadvisor,f0/cadvisor,kmicheal/cadvisor,anarcher/cadvisor,morpheyesh/cadvisor,ncdc/cadvisor,linux-on-ibm-z/cadvisor,bowlofstew/cadvisor,derwolfe/cadvisor,IFTTT/cadvisor,hzy001/cadvisor,BrickXu/cadvisor,ainsleyc/cadvisor,pwittrock/cadvisor,timstclair/cadvisor,dchen1107/cadvisor,CrazyJvm/cadvisor,ncdc/cadvisor,whosthatknocking/cadvisor,datawisesystems/cadvisor,derekwaynecarr/cadvisor,c-st/cadvisor,ainsleyc/cadvisor,pwittrock/cadvisor,IFTTT/cadvisor,takecy/cadvisor,anarcher/cadvisor,datawisesystems/cadvisor,jimmidyson/cadvisor,jhjeong-kr/cadvisor,megamsys/cadvisor,BrickXu/cadvisor