Make subcommand_not_found message loader-specific to give more helpful error message when using a plugin manifest.
Make subcommand_not_found message loader-specific to give more helpful error message when using a plugin manifest.

natewalck/chef,gene1wood/chef,josb/chef,nvwls/chef,nathwill/chef,aaron-lane/chef,gsaslis/chef,malisettirammurthy/chef,baberthal/chef,malisettirammurthy/chef,BackSlasher/chef,webframp/chef,tbunnyman/chef,sanditiffin/chef,MichaelPereira/chef,ducthanh/chef,aaron-lane/chef,Ppjet6/chef,ChaosCloud/chef,acaiafa/chef,nguyen-tien-mulodo/chef,gene1wood/chef,mal/chef,chef/chef,tas50/chef-1,sanditiffin/chef,nvwls/chef,ranjib/chef,criteo-forks/chef,webframp/chef,higanworks/chef,someara/chef,erkolson/chef,ChaosCloud/chef,Kast0rTr0y/chef,natewalck/chef,sanditiffin/chef,evan2645/chef,jkerry/chef,strangelittlemonkey/chef,baberthal/chef,smurawski/chef,permyakovsv/chef,malisettirammurthy/chef,kaznishi/chef,Ppjet6/chef,onlyhavecans/chef,acaiafa/chef,zuazo-forks/chef,MsysTechnologiesllc/chef,oclaussen/chef,nicklv/chef,sanditiffin/chef,EasonYi/chef,tomdoherty/chef,martinisoft/chef,mikedodge04/chef,zuazo-forks/chef,mikedodge04/chef,acaiafa/chef,MichaelPereira/chef,smurawski/chef,robmul/chef,mikedodge04/chef,mikedodge04/chef,webframp/chef,tbunnyman/chef,sanditiffin/chef,tas50/chef-1,custora/chef,evan2645/chef,nvwls/chef,higanworks/chef,baberthal/chef,higanworks/chef,tomdoherty/chef,nathwill/chef,mattray/chef,docwhat/chef,Kast0rTr0y/chef,criteo-forks/chef,clintoncwolfe/chef,Kast0rTr0y/chef,tbriggs-curse/chef,evan2645/chef,ktpan/chef-play,AndyBoucher/Chef-Testing,juliandunn/chef,sekrett/chef,antonifs/chef,mal/chef,gene1wood/chef,clintoncwolfe/chef,jonlives/chef,Ppjet6/chef,ChaosCloud/chef,tbriggs-curse/chef,youngjl1/chef,onlyhavecans/chef,higanworks/chef,oclaussen/chef,someara/chef,jonlives/chef,jonlives/chef,3dinfluence/chef,kaznishi/chef,mio-g/chef,evan2645/chef,oclaussen/chef,erkolson/chef,zuazo-forks/chef,MsysTechnologiesllc/chef,clintoncwolfe/chef,docwhat/chef,BackSlasher/chef,circleback/chef,jkerry/chef,custora/chef,adamleff/chef,antonifs/chef,circleback/chef,robmul/chef,cgvarela/chef,josb/chef,Ppjet6/chef,mattray/chef,robmul/chef,josb/chef,adamleff/chef,mal/chef,zuazo-forks/chef,robmul/chef,tomdoherty/chef,MichaelPereira/chef,lamont-granquist/chef,onlyhavecans/chef,brettcave/chef,b002368/chef-repo,mio-g/chef,cgvarela/chef,MichaelPereira/chef,mio-g/chef,jaymzh/chef,Tensibai/chef,nvwls/chef,aaron-lane/chef,b002368/chef-repo,ranjib/chef,AndyBoucher/Chef-Testing,malisettirammurthy/chef,Ppjet6/chef,sanditiffin/chef,jonlives/chef,EasonYi/chef,smurawski/chef,tbriggs-curse/chef,brettcave/chef,3dinfluence/chef,martinisoft/chef,onlyhavecans/chef,custora/chef,AndyBoucher/Chef-Testing,clintoncwolfe/chef,lamont-granquist/chef,tbriggs-curse/chef,natewalck/chef,juliandunn/chef,kaznishi/chef,EasonYi/chef,martinisoft/chef,malisettirammurthy/chef,lamont-granquist/chef,acaiafa/chef,chef/chef,antonifs/chef,faspl/chef,someara/chef,jk47/chef,gsaslis/chef,aaron-lane/chef,mal/chef,jk47/chef,ktpan/chef-play,Tensibai/chef,permyakovsv/chef,nicklv/chef,BackSlasher/chef,mwrock/chef,BackSlasher/chef,josb/chef,mal/chef,gene1wood/chef,custora/chef,h4ck3rm1k3/chef,faspl/chef,evan2645/chef,nsdavidson/chef,nguyen-tien-mulodo/chef,brettcave/chef,MichaelPereira/chef,nsdavidson/chef,baberthal/chef,criteo-forks/chef,strangelittlemonkey/chef,tbriggs-curse/chef,baberthal/chef,jk47/chef,Kast0rTr0y/chef,lamont-granquist/chef,youngjl1/chef,Tensibai/chef,nsdavidson/chef,erkolson/chef,robmul/chef,nicklv/chef,baberthal/chef,ranjib/chef,antonifs/chef,aaron-lane/chef,criteo-forks/chef,h4ck3rm1k3/chef,tomdoherty/chef,antonifs/chef,nathwill/chef,ranjib/chef,brettcave/chef,Tensibai/chef,h4ck3rm1k3/chef,webframp/chef,EasonYi/chef,webframp/chef,tbunnyman/chef,smurawski/chef,mattray/chef,ducthanh/chef,OpSitters/chef,josb/chef,sekrett/chef,erkolson/chef,custora/chef,BackSlasher/chef,evan2645/chef,adamleff/chef,clintoncwolfe/chef,Kast0rTr0y/chef,zuazo-forks/chef,EasonYi/chef,brettcave/chef,nguyen-tien-mulodo/chef,jkerry/chef,acaiafa/chef,adamleff/chef,MichaelPereira/chef,sekrett/chef,circleback/chef,nsdavidson/chef,mattray/chef,nicklv/chef,chef/chef,zuazo-forks/chef,ducthanh/chef,ChaosCloud/chef,nathwill/chef,brettcave/chef,kaznishi/chef,nsdavidson/chef,malisettirammurthy/chef,gsaslis/chef,juliandunn/chef,erkolson/chef,youngjl1/chef,higanworks/chef,3dinfluence/chef,gsaslis/chef,sekrett/chef,nicklv/chef,cgvarela/chef,gsaslis/chef,jonlives/chef,cgvarela/chef,webframp/chef,tas50/chef-1,cgvarela/chef,adamleff/chef,3dinfluence/chef,Ppjet6/chef,nguyen-tien-mulodo/chef,OpSitters/chef,oclaussen/chef,docwhat/chef,AndyBoucher/Chef-Testing,h4ck3rm1k3/chef,jkerry/chef,gsaslis/chef,someara/chef,mwrock/chef,EasonYi/chef,martinisoft/chef,3dinfluence/chef,criteo-forks/chef,b002368/chef-repo,tbunnyman/chef,acaiafa/chef,oclaussen/chef,jk47/chef,lamont-granquist/chef,mattray/chef,circleback/chef,OpSitters/chef,nathwill/chef,nvwls/chef,tbriggs-curse/chef,smurawski/chef,youngjl1/chef,mal/chef,mikedodge04/chef,AndyBoucher/Chef-Testing,robmul/chef,b002368/chef-repo,mio-g/chef,juliandunn/chef,aaron-lane/chef,permyakovsv/chef,Tensibai/chef,jonlives/chef,sekrett/chef,faspl/chef,strangelittlemonkey/chef,nathwill/chef,jkerry/chef,antonifs/chef,martinisoft/chef,permyakovsv/chef,jk47/chef,BackSlasher/chef,h4ck3rm1k3/chef,youngjl1/chef,OpSitters/chef,jkerry/chef,mio-g/chef,strangelittlemonkey/chef,cgvarela/chef,nsdavidson/chef,juliandunn/chef,onlyhavecans/chef,smurawski/chef,someara/chef,faspl/chef,nguyen-tien-mulodo/chef,jaymzh/chef,jk47/chef,tas50/chef-1,ducthanh/chef,oclaussen/chef,docwhat/chef,tomdoherty/chef,erkolson/chef,onlyhavecans/chef,tbunnyman/chef,OpSitters/chef,3dinfluence/chef,natewalck/chef,chef/chef,youngjl1/chef,natewalck/chef,b002368/chef-repo,ktpan/chef-play,ducthanh/chef,strangelittlemonkey/chef,ChaosCloud/chef,mio-g/chef,ktpan/chef-play,ktpan/chef-play,MsysTechnologiesllc/chef,nicklv/chef,criteo-forks/chef,ChaosCloud/chef,jaymzh/chef,jaymzh/chef,nvwls/chef,Kast0rTr0y/chef,h4ck3rm1k3/chef,permyakovsv/chef,ducthanh/chef,kaznishi/chef,lamont-granquist/chef,ranjib/chef,circleback/chef,mikedodge04/chef,ranjib/chef,mwrock/chef,permyakovsv/chef,faspl/chef,b002368/chef-repo,docwhat/chef,custora/chef,circleback/chef,AndyBoucher/Chef-Testing,docwhat/chef,sekrett/chef,strangelittlemonkey/chef,someara/chef,adamleff/chef,kaznishi/chef,natewalck/chef,clintoncwolfe/chef,MsysTechnologiesllc/chef,ktpan/chef-play,josb/chef,tbunnyman/chef,OpSitters/chef,faspl/chef,nguyen-tien-mulodo/chef,mwrock/chef