Check if proxy env_var is empty
Check if proxy env_var is empty

We need to check if the env variable is set to empty string. If we don't we can get in an edge case where we blow up trying to call URI.parse.
askl56/chef,jblaine/chef,joemiller/chef,malisettirammurthy/chef,onlyhavecans/chef,nathwill/chef,josb/chef,faspl/chef,chef/chef,sempervictus/chef,zshuo/chef,tbriggs-curse/chef,lamont-granquist/chef,zuazo-forks/chef,skmichaelson/chef,nathwill/chef,oclaussen/chef,custora/chef,nicklv/chef,tbunnyman/chef,skmichaelson/chef,smurawski/chef,Tensibai/chef,nicklv/chef,sekrett/chef,askl56/chef,strangelittlemonkey/chef,jagdeesh109/chef,ranjib/chef,aaron-lane/chef,antonifs/chef,cachamber/chef,karthikrev/chef,jimmymccrory/chef,ducthanh/chef,malisettirammurthy/chef,sanditiffin/chef,webframp/chef,3dinfluence/chef,karthikrev/chef,mikefaille/chef,karthikrev/chef,natewalck/chef,MichaelPereira/chef,jonlives/chef,someara/chef,jblaine/chef,jimmymccrory/chef,jmhardison/chef,someara/chef,criteo-forks/chef,martinisoft/chef,cachamber/chef,grubernaut/chef,3dinfluence/chef,youngjl1/chef,ktpan/chef-play,ktpan/chef-play,nguyen-tien-mulodo/chef,OpSitters/chef,lamont-granquist/chef,webframp/chef,erkolson/chef,Ppjet6/chef,martinb3/chef,mio-g/chef,antonifs/chef,paulmooring/chef,baberthal/chef,sempervictus/chef,permyakovsv/chef,Igorshp/chef,joemiller/chef,natewalck/chef,faspl/chef,h4ck3rm1k3/chef,faspl/chef,nvwls/chef,b002368/chef-repo,EasonYi/chef,b002368/chef-repo,ccsplit/chef,nvwls/chef,baberthal/chef,circleback/chef,martinb3/chef,jk47/chef,MichaelPereira/chef,brettcave/chef,Ppjet6/chef,grubernaut/chef,tbriggs-curse/chef,nellshamrell/chef,lamont-granquist/chef,josb/chef,sanditiffin/chef,tas50/chef-1,AndyBoucher/Chef-Testing,MsysTechnologiesllc/chef,acaiafa/chef,jk47/chef,strangelittlemonkey/chef,juliandunn/chef,natewalck/chef,zshuo/chef,ekometti/chef,ranjib/chef,nvwls/chef,chef/chef,circleback/chef,ChaosCloud/chef,patcon/chef,docwhat/chef,adamleff/chef,permyakovsv/chef,nalingarg2/chef-1,evan2645/chef,docwhat/chef,jonlives/chef,nalingarg2/chef-1,jaymzh/chef,sempervictus/chef,jonlives/chef,patcon/chef,josb/chef,skmichaelson/chef,oclaussen/chef,renanvicente/chef,circleback/chef,sometimesfood/chef,grubernaut/chef,oclaussen/chef,gene1wood/chef,skmichaelson/chef,grubernaut/chef,tbunnyman/chef,mikedodge04/chef,permyakovsv/chef,mwrock/chef,sekrett/chef,nguyen-tien-mulodo/chef,chef/chef,cgvarela/chef,clintoncwolfe/chef,clintoncwolfe/chef,jblaine/chef,jaymzh/chef,youngjl1/chef,nsdavidson/chef,joemiller/chef,ChaosCloud/chef,ekometti/chef,natewalck/chef,mikefaille/chef,martinb3/chef,jkerry/chef,andrewpsp/chef,baberthal/chef,lamont-granquist/chef,karthikrev/chef,b002368/chef-repo,mwrock/chef,ktpan/chef-play,b002368/chef-repo,brettcave/chef,acaiafa/chef,Tensibai/chef,nellshamrell/chef,Kast0rTr0y/chef,jkerry/chef,DeWaRs1206/chef,smurawski/chef,strangelittlemonkey/chef,nalingarg2/chef-1,onlyhavecans/chef,jimmymccrory/chef,paulmooring/chef,ktpan/chef-play,mikedodge04/chef,robmul/chef,evan2645/chef,webframp/chef,nalingarg2/chef-1,martinisoft/chef,nsdavidson/chef,ChaosCloud/chef,3dinfluence/chef,ChaosCloud/chef,brettcave/chef,jagdeesh109/chef,onlyhavecans/chef,ducthanh/chef,Kast0rTr0y/chef,ccsplit/chef,brettcave/chef,paulmooring/chef,joemiller/chef,tbunnyman/chef,sometimesfood/chef,nsdavidson/chef,mattray/chef,joemiller/chef,clintoncwolfe/chef,sanditiffin/chef,mikefaille/chef,polamjag/chef,Ppjet6/chef,MsysTechnologiesllc/chef,higanworks/chef,DeWaRs1206/chef,juliandunn/chef,nguyen-tien-mulodo/chef,renanvicente/chef,paulmooring/chef,nsdavidson/chef,ducthanh/chef,sometimesfood/chef,baberthal/chef,grubernaut/chef,robmul/chef,MsysTechnologiesllc/chef,ccsplit/chef,strangelittlemonkey/chef,strangelittlemonkey/chef,polamjag/chef,ckaushik/chef,BackSlasher/chef,webframp/chef,docwhat/chef,ckaushik/chef,onlyhavecans/chef,acaiafa/chef,aaron-lane/chef,juliandunn/chef,docwhat/chef,ktpan/chef-play,ckaushik/chef,ranjib/chef,gene1wood/chef,someara/chef,sekrett/chef,Kast0rTr0y/chef,zshuo/chef,youngjl1/chef,martinb3/chef,Tensibai/chef,patcon/chef,tbriggs-curse/chef,lamont-granquist/chef,malisettirammurthy/chef,permyakovsv/chef,andrewpsp/chef,acaiafa/chef,zuazo-forks/chef,nvwls/chef,cachamber/chef,ckaushik/chef,polamjag/chef,adamleff/chef,kaznishi/chef,EasonYi/chef,oclaussen/chef,mattray/chef,martinisoft/chef,zuazo-forks/chef,tomdoherty/chef,paulmooring/chef,DeWaRs1206/chef,AndyBoucher/Chef-Testing,skmichaelson/chef,nellshamrell/chef,ekometti/chef,mikedodge04/chef,ducthanh/chef,youngjl1/chef,Igorshp/chef,mikedodge04/chef,jimmymccrory/chef,DeWaRs1206/chef,criteo-forks/chef,ranjib/chef,patcon/chef,brettcave/chef,criteo-forks/chef,renanvicente/chef,tomdoherty/chef,askl56/chef,OpSitters/chef,evan2645/chef,ChaosCloud/chef,MichaelPereira/chef,nalingarg2/chef-1,kaznishi/chef,tas50/chef-1,martinisoft/chef,b002368/chef-repo,jmhardison/chef,onlyhavecans/chef,mio-g/chef,webframp/chef,b002368/chef-repo,chef/chef,josb/chef,baberthal/chef,nathwill/chef,mikefaille/chef,nathwill/chef,custora/chef,antonifs/chef,Ppjet6/chef,sempervictus/chef,gene1wood/chef,nicklv/chef,ckaushik/chef,nsdavidson/chef,jmhardison/chef,gsaslis/chef,BackSlasher/chef,gsaslis/chef,BackSlasher/chef,3dinfluence/chef,polamjag/chef,andrewpsp/chef,mal/chef,zuazo-forks/chef,tomdoherty/chef,tbriggs-curse/chef,AndyBoucher/Chef-Testing,andrewpsp/chef,strangelittlemonkey/chef,joemiller/chef,Tensibai/chef,mattray/chef,malisettirammurthy/chef,aaron-lane/chef,mio-g/chef,h4ck3rm1k3/chef,robmul/chef,mio-g/chef,faspl/chef,mikedodge04/chef,oclaussen/chef,nellshamrell/chef,polamjag/chef,youngjl1/chef,clintoncwolfe/chef,gsaslis/chef,cgvarela/chef,tbriggs-curse/chef,jaymzh/chef,martinisoft/chef,oclaussen/chef,tbriggs-curse/chef,criteo-forks/chef,3dinfluence/chef,askl56/chef,paulmooring/chef,ducthanh/chef,custora/chef,brettcave/chef,circleback/chef,mikedodge04/chef,ranjib/chef,h4ck3rm1k3/chef,DeWaRs1206/chef,martinb3/chef,jkerry/chef,3dinfluence/chef,grubernaut/chef,jblaine/chef,karthikrev/chef,aaron-lane/chef,MichaelPereira/chef,nathwill/chef,jk47/chef,patcon/chef,tbunnyman/chef,OpSitters/chef,ranjib/chef,zuazo-forks/chef,someara/chef,juliandunn/chef,gsaslis/chef,higanworks/chef,onlyhavecans/chef,jmhardison/chef,gsaslis/chef,sempervictus/chef,zshuo/chef,andrewpsp/chef,custora/chef,higanworks/chef,kaznishi/chef,mal/chef,aaron-lane/chef,sometimesfood/chef,cachamber/chef,natewalck/chef,mwrock/chef,Igorshp/chef,jkerry/chef,mwrock/chef,jk47/chef,nalingarg2/chef-1,AndyBoucher/Chef-Testing,h4ck3rm1k3/chef,Kast0rTr0y/chef,skmichaelson/chef,Kast0rTr0y/chef,mal/chef,jblaine/chef,erkolson/chef,cgvarela/chef,acaiafa/chef,baberthal/chef,ekometti/chef,smurawski/chef,custora/chef,adamleff/chef,gsaslis/chef,tas50/chef-1,EasonYi/chef,Igorshp/chef,antonifs/chef,ccsplit/chef,smurawski/chef,mal/chef,sometimesfood/chef,askl56/chef,malisettirammurthy/chef,evan2645/chef,jimmymccrory/chef,jimmymccrory/chef,mikefaille/chef,jagdeesh109/chef,Ppjet6/chef,sanditiffin/chef,ccsplit/chef,jk47/chef,OpSitters/chef,sekrett/chef,sanditiffin/chef,mal/chef,tomdoherty/chef,permyakovsv/chef,askl56/chef,jmhardison/chef,nellshamrell/chef,adamleff/chef,evan2645/chef,sometimesfood/chef,circleback/chef,erkolson/chef,zuazo-forks/chef,youngjl1/chef,jk47/chef,mattray/chef,nvwls/chef,tbunnyman/chef,EasonYi/chef,tbunnyman/chef,Ppjet6/chef,kaznishi/chef,custora/chef,jonlives/chef,faspl/chef,patcon/chef,nguyen-tien-mulodo/chef,robmul/chef,OpSitters/chef,jonlives/chef,renanvicente/chef,antonifs/chef,robmul/chef,nguyen-tien-mulodo/chef,cachamber/chef,adamleff/chef,webframp/chef,MichaelPereira/chef,nellshamrell/chef,criteo-forks/chef,zshuo/chef,EasonYi/chef,tas50/chef-1,higanworks/chef,malisettirammurthy/chef,Kast0rTr0y/chef,kaznishi/chef,Tensibai/chef,nicklv/chef,robmul/chef,sempervictus/chef,MsysTechnologiesllc/chef,jkerry/chef,mal/chef,josb/chef,someara/chef,nsdavidson/chef,cgvarela/chef,clintoncwolfe/chef,faspl/chef,sekrett/chef,nicklv/chef,ckaushik/chef,cachamber/chef,lamont-granquist/chef,nvwls/chef,adamleff/chef,erkolson/chef,jagdeesh109/chef,Igorshp/chef,andrewpsp/chef,jaymzh/chef,mattray/chef,erkolson/chef,jagdeesh109/chef,aaron-lane/chef,AndyBoucher/Chef-Testing,nicklv/chef,ekometti/chef,cgvarela/chef,natewalck/chef,OpSitters/chef,smurawski/chef,criteo-forks/chef,mikefaille/chef,BackSlasher/chef,mio-g/chef,AndyBoucher/Chef-Testing,polamjag/chef,MichaelPereira/chef,renanvicente/chef,ChaosCloud/chef,jmhardison/chef,jblaine/chef,ktpan/chef-play,EasonYi/chef,circleback/chef,BackSlasher/chef,sanditiffin/chef,tomdoherty/chef,nguyen-tien-mulodo/chef,someara/chef,BackSlasher/chef,acaiafa/chef,DeWaRs1206/chef,Igorshp/chef,smurawski/chef,nathwill/chef,docwhat/chef,martinb3/chef,erkolson/chef,higanworks/chef,mio-g/chef,h4ck3rm1k3/chef,ekometti/chef,docwhat/chef,zshuo/chef,evan2645/chef,antonifs/chef,juliandunn/chef,renanvicente/chef,jagdeesh109/chef,ducthanh/chef,josb/chef,jkerry/chef,ccsplit/chef,h4ck3rm1k3/chef,karthikrev/chef,sekrett/chef,cgvarela/chef,clintoncwolfe/chef,permyakovsv/chef,gene1wood/chef,jonlives/chef,kaznishi/chef