Add support for binding nics to our bridges from the command line.
Add support for binding nics to our bridges from the command line.

dirkmueller/crowbar,aspiers/crowbar,aplanas/crowbar,crowbar/crowbar,vwallfahrer/crowbar,mmnelemane/crowbar,rhafer/crowbar,dirkmueller/crowbar,rsalevsky/crowbar,MaximilianMeister/crowbar,SUSE-Cloud/crowbar,crowbar/crowbar,rsalevsky/crowbar,MaximilianMeister/crowbar,vwallfahrer/crowbar,tserong/crowbar,toabctl/crowbar,mmnelemane/crowbar,rhafer/crowbar,toabctl/crowbar,SUSE-Cloud/crowbar,rhafer/crowbar,aspiers/crowbar,tserong/crowbar,nkrinner/crowbar,nkrinner/crowbar,aplanas/crowbar