Allow multiple knives on same host using KNIFE_HOME env variable
Allow multiple knives on same host using KNIFE_HOME env variable

sysbot/chef,jmhardison/chef,jordane/chef,mwrock/chef,patcon/chef,ekometti/chef,ranjib/chef,josb/chef,mikedodge04/chef,Ppjet6/chef,nellshamrell/chef,DeWaRs1206/chef,kaznishi/chef,ktpan/chef-play,brettcave/chef,sideci-sample/sideci-sample-chef,skmichaelson/chef,jimmymccrory/chef,higanworks/chef,ShadySQL/chef-merged,nsdavidson/chef,ccsplit/chef,bahamas10/chef,SUSE-Cloud/chef,jimmymccrory/chef,b002368/chef-repo,malisettirammurthy/chef,mio-g/chef,Igorshp/chef,ccope/chef,h4ck3rm1k3/chef,tomdoherty/chef,askl56/chef,gsaslis/chef,jaymzh/chef,kaznishi/chef,lamont-granquist/chef,ducthanh/chef,acaiafa/chef,someara/chef,swalberg/chef,criteo-forks/chef,ccsplit/chef,pburkholder/chef,jblaine/chef,DeWaRs1206/chef,SUSE-Cloud/chef,Igorshp/chef,mio-g/chef,pburkholder/chef,mikedodge04/chef,Tensibai/chef,smurawski/chef,BackSlasher/chef,sempervictus/chef,josb/chef,tbunnyman/chef,higanworks/chef,BackSlasher/chef,mikefaille/chef,GabKlein/chef-merged,criteo-forks/chef,nicklv/chef,mikefaille/chef,sideci-sample/sideci-sample-chef,mio-g/chef,nellshamrell/chef,Kast0rTr0y/chef,evan2645/chef,nguyen-tien-mulodo/chef,gsaslis/chef,zuazo-forks/chef,paulmooring/chef,martinb3/chef,zuazo-forks/chef,sysbot/chef,swalberg/chef,cgvarela/chef,sempervictus/chef,renanvicente/chef,tbriggs-curse/chef,ekometti/chef,chef/chef,mattray/chef,pburkholder/chef,ktpan/chef-play,robmul/chef,malisettirammurthy/chef,aspiers/chef,ccope/chef,jordane/chef,MichaelPereira/chef,grubernaut/chef,jonlives/chef,jmhardison/chef,nvwls/chef,mikefaille/chef,kisoku/chef,jmhardison/chef,natewalck/chef,nicklv/chef,h4ck3rm1k3/chef,martinisoft/chef,jmhardison/chef,polamjag/chef,3dinfluence/chef,andrewpsp/chef,ktpan/chef-play,smurawski/chef,karthikrev/chef,ducthanh/chef,erkolson/chef,3dinfluence/chef,swalberg/chef,BackSlasher/chef,robmul/chef,patcon/chef,adamleff/chef,lamont-granquist/chef,zshuo/chef,DeWaRs1206/chef,AndyBoucher/Chef-Testing,DeWaRs1206/chef,danielsdeleo/seth,kaznishi/chef,aaron-lane/chef,legal90/chef,martinisoft/chef,sekrett/chef,jk47/chef,DeWaRs1206/chef,custora/chef,juliandunn/chef,antonifs/chef,cgvarela/chef,ckaushik/chef,tas50/chef-1,cmluciano/chef,cachamber/chef,zshuo/chef,ShadySQL/chef-merged,nguyen-tien-mulodo/chef,ShadySQL/chef-merged,coderanger/chef,nguyen-tien-mulodo/chef,patcon/chef,ccsplit/chef,coderanger/chef,Tensibai/chef,martinb3/chef,jk47/chef,oclaussen/chef,Ppjet6/chef,tbunnyman/chef,ccope/chef,joemiller/chef,kamaradclimber/chef,martinisoft/chef,martinb3/chef,jkerry/chef,higanworks/chef,webframp/chef,joemiller/chef,aspiers/chef,lamont-granquist/chef,jonlives/chef,3dinfluence/chef,tbriggs-curse/chef,grubernaut/chef,criteo-forks/chef,joemiller/chef,permyakovsv/chef,nathwill/chef,nvwls/chef,clintoncwolfe/chef,lamont-granquist/chef,sekrett/chef,malisettirammurthy/chef,jkerry/chef,nguyen-tien-mulodo/chef,circleback/chef,someara/chef,gene1wood/chef,b002368/chef-repo,mikedodge04/chef,baberthal/chef,permyakovsv/chef,tbriggs-curse/chef,renanvicente/chef,circleback/chef,erkolson/chef,circleback/chef,tbriggs-curse/chef,paulmooring/chef,jblaine/chef,andrewpsp/chef,ranjib/chef,aaron-lane/chef,sometimesfood/chef,webframp/chef,mikefaille/chef,sanditiffin/chef,askl56/chef,lamont-granquist/chef,aaron-lane/chef,josb/chef,kamaradclimber/chef,sanditiffin/chef,someara/chef,nguyen-tien-mulodo/chef,permyakovsv/chef,danielsdeleo/seth,EasonYi/chef,jagdeesh109/chef,zshuo/chef,jmhardison/chef,kisoku/chef,cachamber/chef,higanworks/chef,coderanger/chef,tomdoherty/chef,acaiafa/chef,aaron-lane/chef,joemiller/chef,b002368/chef-repo,danielsdeleo/seth,permyakovsv/chef,EasonYi/chef,chef/chef,docwhat/chef,danielsdeleo/seth,jimmymccrory/chef,onlyhavecans/chef,brettcave/chef,Ppjet6/chef,b002368/chef-repo,smurawski/chef,permyakovsv/chef,jk47/chef,askl56/chef,b002368/chef-repo,mal/chef,OpSitters/chef,chef/chef,bahamas10/chef,tbriggs-curse/chef,ktpan/chef-play,nellshamrell/chef,mal/chef,OpSitters/chef,adamleff/chef,webframp/chef,jkerry/chef,h4ck3rm1k3/chef,sysbot/chef,tbriggs-curse/chef,b002368/chef-repo,cmluciano/chef,OpSitters/chef,jblaine/chef,nsdavidson/chef,antonifs/chef,oclaussen/chef,3dinfluence/chef,Tensibai/chef,jagdeesh109/chef,mattray/chef,higanworks/chef,acaiafa/chef,Tensibai/chef,sideci-sample/sideci-sample-chef,someara/chef,jaymzh/chef,chef/chef,Igorshp/chef,brettcave/chef,OpSitters/chef,onlyhavecans/chef,robmul/chef,youngjl1/chef,jk47/chef,sometimesfood/chef,ranjib/chef,ducthanh/chef,sanditiffin/chef,zuazo-forks/chef,jagdeesh109/chef,aspiers/chef,onlyhavecans/chef,askl56/chef,evan2645/chef,robmul/chef,antonifs/chef,someara/chef,patcon/chef,ckaushik/chef,jimmymccrory/chef,jkerry/chef,joemiller/chef,gsaslis/chef,nicklv/chef,faspl/chef,criteo-forks/chef,ccsplit/chef,martinb3/chef,tomdoherty/chef,evan2645/chef,onlyhavecans/chef,smurawski/chef,oclaussen/chef,josb/chef,sometimesfood/chef,renanvicente/chef,kisoku/chef,ekometti/chef,sempervictus/chef,mio-g/chef,cgvarela/chef,EasonYi/chef,zshuo/chef,paulmooring/chef,martinisoft/chef,permyakovsv/chef,patcon/chef,Igorshp/chef,karthikrev/chef,joemiller/chef,ccsplit/chef,nathwill/chef,BackSlasher/chef,askl56/chef,nvwls/chef,zuazo-forks/chef,bahamas10/chef,strangelittlemonkey/chef,circleback/chef,nellshamrell/chef,bahamas10/chef,jimmymccrory/chef,baberthal/chef,Kast0rTr0y/chef,jordane/chef,ccope/chef,antonifs/chef,Ppjet6/chef,malisettirammurthy/chef,pburkholder/chef,evan2645/chef,adamleff/chef,martinb3/chef,BackSlasher/chef,Ppjet6/chef,jonlives/chef,youngjl1/chef,nalingarg2/chef-1,zuazo-forks/chef,sanditiffin/chef,faspl/chef,MsysTechnologiesllc/chef,acaiafa/chef,nathwill/chef,ckaushik/chef,tbunnyman/chef,antonifs/chef,ShadySQL/chef-merged,karthikrev/chef,kaznishi/chef,sempervictus/chef,nellshamrell/chef,juliandunn/chef,grubernaut/chef,gsaslis/chef,pburkholder/chef,faspl/chef,docwhat/chef,custora/chef,ChaosCloud/chef,h4ck3rm1k3/chef,natewalck/chef,Kast0rTr0y/chef,zshuo/chef,andrewpsp/chef,MsysTechnologiesllc/chef,kisoku/chef,baberthal/chef,malisettirammurthy/chef,andrewpsp/chef,gsaslis/chef,jagdeesh109/chef,ckaushik/chef,kaznishi/chef,clintoncwolfe/chef,sanditiffin/chef,sideci-sample/sideci-sample-chef,legal90/chef,Igorshp/chef,nalingarg2/chef-1,kaznishi/chef,ChaosCloud/chef,mattray/chef,jkerry/chef,tas50/chef-1,docwhat/chef,Igorshp/chef,circleback/chef,cachamber/chef,cgvarela/chef,ktpan/chef-play,juliandunn/chef,mal/chef,nellshamrell/chef,youngjl1/chef,someara/chef,docwhat/chef,mikefaille/chef,askl56/chef,grubernaut/chef,nalingarg2/chef-1,coderanger/chef,AndyBoucher/Chef-Testing,baberthal/chef,Tensibai/chef,josb/chef,clintoncwolfe/chef,sekrett/chef,paulmooring/chef,erkolson/chef,nalingarg2/chef-1,mikefaille/chef,MichaelPereira/chef,ekometti/chef,strangelittlemonkey/chef,nathwill/chef,mikedodge04/chef,GabKlein/chef-merged,docwhat/chef,nvwls/chef,evan2645/chef,mikedodge04/chef,EasonYi/chef,custora/chef,grubernaut/chef,mal/chef,nalingarg2/chef-1,renanvicente/chef,Kast0rTr0y/chef,ChaosCloud/chef,sideci-sample/sideci-sample-chef,josb/chef,jagdeesh109/chef,AndyBoucher/Chef-Testing,circleback/chef,acaiafa/chef,grubernaut/chef,adamleff/chef,erkolson/chef,ranjib/chef,legal90/chef,sysbot/chef,sometimesfood/chef,jmhardison/chef,antonifs/chef,swalberg/chef,ckaushik/chef,evan2645/chef,aaron-lane/chef,natewalck/chef,nicklv/chef,renanvicente/chef,lamont-granquist/chef,sempervictus/chef,robmul/chef,legal90/chef,tomdoherty/chef,onlyhavecans/chef,natewalck/chef,renanvicente/chef,skmichaelson/chef,ChaosCloud/chef,nvwls/chef,sanditiffin/chef,brettcave/chef,sempervictus/chef,nsdavidson/chef,custora/chef,youngjl1/chef,Ppjet6/chef,nathwill/chef,SUSE-Cloud/chef,natewalck/chef,natewalck/chef,nalingarg2/chef-1,cachamber/chef,jaymzh/chef,polamjag/chef,cachamber/chef,karthikrev/chef,youngjl1/chef,skmichaelson/chef,nguyen-tien-mulodo/chef,erkolson/chef,bahamas10/chef,baberthal/chef,cmluciano/chef,mwrock/chef,nvwls/chef,ccsplit/chef,ShadySQL/chef-merged,jk47/chef,ccope/chef,tomdoherty/chef,youngjl1/chef,3dinfluence/chef,ckaushik/chef,ktpan/chef-play,tbunnyman/chef,smurawski/chef,juliandunn/chef,EasonYi/chef,jonlives/chef,strangelittlemonkey/chef,gene1wood/chef,mio-g/chef,Kast0rTr0y/chef,mikedodge04/chef,robmul/chef,mal/chef,ekometti/chef,ChaosCloud/chef,strangelittlemonkey/chef,skmichaelson/chef,MichaelPereira/chef,strangelittlemonkey/chef,cgvarela/chef,ranjib/chef,swalberg/chef,gsaslis/chef,tas50/chef-1,aspiers/chef,jordane/chef,danielsdeleo/seth,SUSE-Cloud/chef,nsdavidson/chef,sekrett/chef,faspl/chef,strangelittlemonkey/chef,jk47/chef,webframp/chef,nicklv/chef,jaymzh/chef,MsysTechnologiesllc/chef,kisoku/chef,jkerry/chef,karthikrev/chef,polamjag/chef,pburkholder/chef,sometimesfood/chef,ducthanh/chef,kamaradclimber/chef,juliandunn/chef,sekrett/chef,oclaussen/chef,ducthanh/chef,MsysTechnologiesllc/chef,GabKlein/chef-merged,BackSlasher/chef,kamaradclimber/chef,baberthal/chef,oclaussen/chef,smurawski/chef,AndyBoucher/Chef-Testing,nathwill/chef,GabKlein/chef-merged,webframp/chef,polamjag/chef,OpSitters/chef,EasonYi/chef,jagdeesh109/chef,jblaine/chef,custora/chef,mattray/chef,mio-g/chef,ducthanh/chef,legal90/chef,gene1wood/chef,cachamber/chef,paulmooring/chef,MichaelPereira/chef,martinb3/chef,bahamas10/chef,jonlives/chef,webframp/chef,mattray/chef,ekometti/chef,nsdavidson/chef,nsdavidson/chef,clintoncwolfe/chef,AndyBoucher/Chef-Testing,acaiafa/chef,swalberg/chef,clintoncwolfe/chef,h4ck3rm1k3/chef,mwrock/chef,SUSE-Cloud/chef,polamjag/chef,faspl/chef,aspiers/chef,cgvarela/chef,adamleff/chef,OpSitters/chef,oclaussen/chef,brettcave/chef,jordane/chef,mal/chef,gene1wood/chef,polamjag/chef,karthikrev/chef,h4ck3rm1k3/chef,zuazo-forks/chef,martinisoft/chef,patcon/chef,erkolson/chef,ranjib/chef,custora/chef,adamleff/chef,MichaelPereira/chef,andrewpsp/chef,sometimesfood/chef,SUSE-Cloud/chef,paulmooring/chef,mwrock/chef,AndyBoucher/Chef-Testing,nicklv/chef,aaron-lane/chef,tbunnyman/chef,onlyhavecans/chef,ChaosCloud/chef,jimmymccrory/chef,docwhat/chef,skmichaelson/chef,sekrett/chef,andrewpsp/chef,3dinfluence/chef,brettcave/chef,MichaelPereira/chef,zshuo/chef,DeWaRs1206/chef,cmluciano/chef,jonlives/chef,cmluciano/chef,sysbot/chef,legal90/chef,skmichaelson/chef,clintoncwolfe/chef,faspl/chef,jblaine/chef,malisettirammurthy/chef,tbunnyman/chef,criteo-forks/chef,Kast0rTr0y/chef,tas50/chef-1,criteo-forks/chef,jblaine/chef