mach commands now warn when it's ambiguous which binary to run
mach commands now warn when it's ambiguous which binary to run

Fixes#5080

walac/servo,szeged/servo,avadacatavra/servo,larsbergstrom/servo,aidanhs/servo,pyfisch/servo,pgonda/servo,mbrubeck/servo,canaltinova/servo,RenaudParis/servo,dvberkel/servo,nick-thompson/servo,boghison/servo,samfoo/servo,WriterOfAlicrow/servo,aweinstock314/servo,rnestler/servo,GyrosOfWar/servo,akosel/servo,upsuper/servo,zhangjunlei26/servo,s142857/servo,jimberlage/servo,rentongzhang/servo,g-k/servo,meh/servo,wpgallih/servo,GreenRecycleBin/servo,dvberkel/servo,runarberg/servo,karlito40/servo,pyfisch/servo,sadmansk/servo,eddyb/servo,codemac/servo,pyecs/servo,thiagopnts/servo,pyfisch/servo,ryancanhelpyou/servo,splav/servo,cbrewster/servo,jimberlage/servo,caldwell/servo,wartman4404/servo,DominoTree/servo,steveklabnik/servo,walac/servo,splav/servo,AnthonyBroadCrawford/servo,GreenRecycleBin/servo,zhangjunlei26/servo,emilio/servo,rixrix/servo,rentongzhang/servo,kindersung/servo,DominoTree/servo,DominoTree/servo,g-k/servo,upsuper/servo,DominoTree/servo,A-deLuna/servo,srbhklkrn/SERVOENGINE,huonw/servo,rixrix/servo,pgonda/servo,evilpie/servo,DominoTree/servo,akosel/servo,sadmansk/servo,GreenRecycleBin/servo,upsuper/servo,notriddle/servo,GyrosOfWar/servo,runarberg/servo,huonw/servo,wartman4404/servo,zhangjunlei26/servo,kindersung/servo,ConnorGBrewster/servo,nerith/servo,youprofit/servo,peterjoel/servo,codemac/servo,mt2d2/servo,deokjinkim/servo,A-deLuna/servo,meh/servo,thiagopnts/servo,saneyuki/servo,ConnorGBrewster/servo,CJ8664/servo,akosel/servo,bjwbell/servo,dvberkel/servo,SimonSapin/servo,walac/servo,notriddle/servo,dsandeephegde/servo,nick-thompson/servo,dsandeephegde/servo,nerith/servo,anthgur/servo,aweinstock314/servo,GyrosOfWar/servo,peterjoel/servo,nick-thompson/servo,mbrubeck/servo,pyfisch/servo,mbrubeck/servo,runarberg/servo,echochamber/servo,indykish/servo,mdibaiee/servo,ConnorGBrewster/servo,eddyb/servo,j3parker/servo,nrc/servo,dsandeephegde/servo,rentongzhang/servo,pyecs/servo,rentongzhang/servo,nick-thompson/servo,upsuper/servo,s142857/servo,hyowon/servo,CJ8664/servo,jimberlage/servo,wpgallih/servo,RenaudParis/servo,bjwbell/servo,aweinstock314/servo,nrc/servo,mt2d2/servo,Adenilson/prototype-viewing-distance,caldwell/servo,dsandeephegde/servo,luniv/servo,nerith/servo,tempbottle/servo,KiChjang/servo,j3parker/servo,jimberlage/servo,larsbergstrom/servo,jgraham/servo,dvberkel/servo,snf/servo,rixrix/servo,kindersung/servo,GreenRecycleBin/servo,nnethercote/servo,pyecs/servo,caldwell/servo,mbrubeck/servo,SimonSapin/servo,cbrewster/servo,meh/servo,brendandahl/servo,Adenilson/prototype-viewing-distance,fiji-flo/servo,cbrewster/servo,KiChjang/servo,pgonda/servo,j3parker/servo,saneyuki/servo,cbrewster/servo,paulrouget/servo,dagnir/servo,deokjinkim/servo,zentner-kyle/servo,runarberg/servo,pyecs/servo,anthgur/servo,jgraham/servo,zentner-kyle/servo,rnestler/servo,eddyb/servo,rnestler/servo,samfoo/servo,tempbottle/servo,KiChjang/servo,jgraham/servo,szeged/servo,pyfisch/servo,ConnorGBrewster/servo,KiChjang/servo,jgraham/servo,snf/servo,tempbottle/servo,notriddle/servo,paulrouget/servo,karlito40/servo,canaltinova/servo,eddyb/servo,WriterOfAlicrow/servo,GreenRecycleBin/servo,dagnir/servo,tafia/servo,boghison/servo,jlegendary/servo,avadacatavra/servo,youprofit/servo,thiagopnts/servo,nnethercote/servo,CJ8664/servo,KiChjang/servo,emilio/servo,karlito40/servo,saratang/servo,rnestler/servo,emilio/servo,splav/servo,nnethercote/servo,DominoTree/servo,kindersung/servo,DominoTree/servo,zentner-kyle/servo,nrc/servo,akosel/servo,cbrewster/servo,samfoo/servo,huonw/servo,pyecs/servo,anthgur/servo,jlegendary/servo,dagnir/servo,jlegendary/servo,cbrewster/servo,DominoTree/servo,dati91/servo,dhananjay92/servo,emilio/servo,samfoo/servo,aidanhs/servo,zhangjunlei26/servo,luniv/servo,brendandahl/servo,notriddle/servo,A-deLuna/servo,j3parker/servo,boghison/servo,boghison/servo,bjwbell/servo,nick-thompson/servo,rnestler/servo,RenaudParis/servo,rixrix/servo,walac/servo,mbrubeck/servo,caldwell/servo,GyrosOfWar/servo,boghison/servo,walac/servo,karlito40/servo,codemac/servo,sadmansk/servo,aweinstock314/servo,anthgur/servo,mattnenterprise/servo,avadacatavra/servo,snf/servo,jdramani/servo,nick-thompson/servo,ryancanhelpyou/servo,SimonSapin/servo,kindersung/servo,samfoo/servo,splav/servo,wpgallih/servo,vks/servo,mbrubeck/servo,peterjoel/servo,echochamber/servo,avadacatavra/servo,ryancanhelpyou/servo,emilio/servo,jlegendary/servo,nrc/servo,indykish/servo,wartman4404/servo,GreenRecycleBin/servo,vks/servo,GreenRecycleBin/servo,aidanhs/servo,j3parker/servo,saneyuki/servo,dati91/servo,caldwell/servo,dhananjay92/servo,rentongzhang/servo,paulrouget/servo,bjwbell/servo,echochamber/servo,deokjinkim/servo,larsbergstrom/servo,canaltinova/servo,snf/servo,jimberlage/servo,thiagopnts/servo,CJ8664/servo,RenaudParis/servo,vks/servo,jlegendary/servo,youprofit/servo,s142857/servo,thiagopnts/servo,aidanhs/servo,nnethercote/servo,dagnir/servo,rnestler/servo,paulrouget/servo,mt2d2/servo,jdramani/servo,tschneidereit/servo,mattnenterprise/servo,codemac/servo,zhangjunlei26/servo,zhangjunlei26/servo,avadacatavra/servo,steveklabnik/servo,peterjoel/servo,dsandeephegde/servo,walac/servo,aidanhs/servo,CJ8664/servo,dsandeephegde/servo,DominoTree/servo,rentongzhang/servo,echochamber/servo,akosel/servo,aidanhs/servo,akosel/servo,aweinstock314/servo,pyfisch/servo,runarberg/servo,emilio/servo,larsbergstrom/servo,SimonSapin/servo,bjwbell/servo,Adenilson/prototype-viewing-distance,g-k/servo,canaltinova/servo,dati91/servo,mt2d2/servo,pgonda/servo,tschneidereit/servo,dagnir/servo,evilpie/servo,mdibaiee/servo,wartman4404/servo,thiagopnts/servo,canaltinova/servo,deokjinkim/servo,saneyuki/servo,runarberg/servo,anthgur/servo,meh/servo,luniv/servo,steveklabnik/servo,deokjinkim/servo,zentner-kyle/servo,mattnenterprise/servo,huonw/servo,dhananjay92/servo,s142857/servo,GreenRecycleBin/servo,RenaudParis/servo,nnethercote/servo,A-deLuna/servo,huonw/servo,echochamber/servo,dvberkel/servo,avadacatavra/servo,tschneidereit/servo,evilpie/servo,indykish/servo,srbhklkrn/SERVOENGINE,nnethercote/servo,jgraham/servo,youprofit/servo,canaltinova/servo,A-deLuna/servo,tafia/servo,SimonSapin/servo,upsuper/servo,notriddle/servo,szeged/servo,codemac/servo,echochamber/servo,mdibaiee/servo,srbhklkrn/SERVOENGINE,notriddle/servo,avadacatavra/servo,steveklabnik/servo,peterjoel/servo,fiji-flo/servo,tafia/servo,steveklabnik/servo,larsbergstrom/servo,walac/servo,hyowon/servo,rixrix/servo,nnethercote/servo,tempbottle/servo,jdramani/servo,saneyuki/servo,nnethercote/servo,anthgur/servo,deokjinkim/servo,ConnorGBrewster/servo,tafia/servo,peterjoel/servo,KiChjang/servo,mt2d2/servo,vks/servo,luniv/servo,indykish/servo,youprofit/servo,youprofit/servo,peterjoel/servo,peterjoel/servo,g-k/servo,brendandahl/servo,fiji-flo/servo,saratang/servo,dhananjay92/servo,SimonSapin/servo,evilpie/servo,jimberlage/servo,anthgur/servo,DominoTree/servo,saneyuki/servo,saneyuki/servo,pyfisch/servo,hyowon/servo,sadmansk/servo,boghison/servo,rixrix/servo,sadmansk/servo,rentongzhang/servo,RenaudParis/servo,GyrosOfWar/servo,nerith/servo,GreenRecycleBin/servo,jdramani/servo,pgonda/servo,zentner-kyle/servo,jlegendary/servo,nerith/servo,steveklabnik/servo,jdramani/servo,hyowon/servo,runarberg/servo,zhangjunlei26/servo,tafia/servo,tempbottle/servo,caldwell/servo,srbhklkrn/SERVOENGINE,mt2d2/servo,mbrubeck/servo,dati91/servo,srbhklkrn/SERVOENGINE,dvberkel/servo,jlegendary/servo,szeged/servo,larsbergstrom/servo,sadmansk/servo,vks/servo,ryancanhelpyou/servo,aidanhs/servo,splav/servo,nick-thompson/servo,luniv/servo,brendandahl/servo,fiji-flo/servo,thiagopnts/servo,akosel/servo,snf/servo,pgonda/servo,CJ8664/servo,s142857/servo,deokjinkim/servo,s142857/servo,dhananjay92/servo,dsandeephegde/servo,aweinstock314/servo,zentner-kyle/servo,ConnorGBrewster/servo,nnethercote/servo,upsuper/servo,aweinstock314/servo,wartman4404/servo,mattnenterprise/servo,wpgallih/servo,dagnir/servo,eddyb/servo,saratang/servo,boghison/servo,splav/servo,nnethercote/servo,pyfisch/servo,CJ8664/servo,mattnenterprise/servo,dhananjay92/servo,echochamber/servo,tschneidereit/servo,wpgallih/servo,sadmansk/servo,pgonda/servo,dati91/servo,evilpie/servo,g-k/servo,meh/servo,upsuper/servo,jgraham/servo,nerith/servo,WriterOfAlicrow/servo,pyecs/servo,indykish/servo,hyowon/servo,AnthonyBroadCrawford/servo,wpgallih/servo,fiji-flo/servo,paulrouget/servo,hyowon/servo,szeged/servo,wpgallih/servo,mattnenterprise/servo,jimberlage/servo,rnestler/servo,wartman4404/servo,indykish/servo,srbhklkrn/SERVOENGINE,thiagopnts/servo,tafia/servo,anthgur/servo,luniv/servo,j3parker/servo,emilio/servo,paulrouget/servo,avadacatavra/servo,evilpie/servo,nrc/servo,tschneidereit/servo,saneyuki/servo,meh/servo,szeged/servo,indykish/servo,eddyb/servo,AnthonyBroadCrawford/servo,tschneidereit/servo,dati91/servo,GyrosOfWar/servo,mt2d2/servo,srbhklkrn/SERVOENGINE,bjwbell/servo,cbrewster/servo,rnestler/servo,A-deLuna/servo,karlito40/servo,paulrouget/servo,mattnenterprise/servo,jimberlage/servo,larsbergstrom/servo,canaltinova/servo,jdramani/servo,luniv/servo,mdibaiee/servo,zhangjunlei26/servo,brendandahl/servo,huonw/servo,nrc/servo,youprofit/servo,eddyb/servo,Adenilson/prototype-viewing-distance,karlito40/servo,vks/servo,dhananjay92/servo,larsbergstrom/servo,upsuper/servo,sadmansk/servo,A-deLuna/servo,notriddle/servo,brendandahl/servo,g-k/servo,kindersung/servo,tafia/servo,jimberlage/servo,mattnenterprise/servo,emilio/servo,tempbottle/servo,kindersung/servo,evilpie/servo,szeged/servo,dsandeephegde/servo,saratang/servo,splav/servo,hyowon/servo,pyecs/servo,codemac/servo,j3parker/servo,AnthonyBroadCrawford/servo,AnthonyBroadCrawford/servo,samfoo/servo,fiji-flo/servo,brendandahl/servo,eddyb/servo,szeged/servo,paulrouget/servo,ryancanhelpyou/servo,paulrouget/servo,canaltinova/servo,notriddle/servo,KiChjang/servo,jgraham/servo,wpgallih/servo,Adenilson/prototype-viewing-distance,WriterOfAlicrow/servo,larsbergstrom/servo,mdibaiee/servo,WriterOfAlicrow/servo,KiChjang/servo,SimonSapin/servo,snf/servo,zentner-kyle/servo,evilpie/servo,szeged/servo,AnthonyBroadCrawford/servo,saratang/servo,Adenilson/prototype-viewing-distance,nerith/servo,bjwbell/servo,WriterOfAlicrow/servo,saneyuki/servo,dati91/servo,SimonSapin/servo,splav/servo,indykish/servo,KiChjang/servo,tschneidereit/servo,indykish/servo,ryancanhelpyou/servo,peterjoel/servo,steveklabnik/servo,saneyuki/servo,notriddle/servo,szeged/servo,WriterOfAlicrow/servo,evilpie/servo,mbrubeck/servo,splav/servo,pyfisch/servo,notriddle/servo,cbrewster/servo,s142857/servo,CJ8664/servo,wpgallih/servo,wartman4404/servo,tempbottle/servo,mdibaiee/servo,g-k/servo,vks/servo,samfoo/servo,dati91/servo,mdibaiee/servo,paulrouget/servo,AnthonyBroadCrawford/servo,snf/servo,huonw/servo,dagnir/servo,ryancanhelpyou/servo,larsbergstrom/servo,karlito40/servo,fiji-flo/servo,caldwell/servo,peterjoel/servo,rixrix/servo,emilio/servo,nrc/servo,jdramani/servo,KiChjang/servo,emilio/servo,codemac/servo,ConnorGBrewster/servo,ConnorGBrewster/servo,zhangjunlei26/servo,RenaudParis/servo,pyfisch/servo,rixrix/servo,dvberkel/servo,splav/servo,meh/servo,fiji-flo/servo,saratang/servo,Adenilson/prototype-viewing-distance,GyrosOfWar/servo,saratang/servo,rixrix/servo