fix proxy var issues
fix proxy var issues

- if the env var is already set, leave it alone
- look for '://' to see if we were given a scheme or not
  (https_proxy may be passed an 'http://' url)

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