Revert "Use rustup "proxies" instead of `rustup run`"
Revert "Use rustup "proxies" instead of `rustup run`"

This reverts commit ad22368646290510149d33a0a41fc436ac4a0e96.

jimberlage/servo,emilio/servo,KiChjang/servo,splav/servo,splav/servo,peterjoel/servo,ConnorGBrewster/servo,peterjoel/servo,dati91/servo,jimberlage/servo,KiChjang/servo,SimonSapin/servo,DominoTree/servo,emilio/servo,emilio/servo,ConnorGBrewster/servo,fiji-flo/servo,canaltinova/servo,pyfisch/servo,larsbergstrom/servo,emilio/servo,dati91/servo,notriddle/servo,fiji-flo/servo,notriddle/servo,dati91/servo,sadmansk/servo,mbrubeck/servo,dati91/servo,pyfisch/servo,KiChjang/servo,jimberlage/servo,paulrouget/servo,nnethercote/servo,dati91/servo,splav/servo,anthgur/servo,fiji-flo/servo,avadacatavra/servo,splav/servo,jimberlage/servo,splav/servo,sadmansk/servo,szeged/servo,nnethercote/servo,SimonSapin/servo,canaltinova/servo,KiChjang/servo,avadacatavra/servo,mbrubeck/servo,upsuper/servo,sadmansk/servo,mbrubeck/servo,anthgur/servo,nnethercote/servo,canaltinova/servo,thiagopnts/servo,KiChjang/servo,emilio/servo,pyfisch/servo,nnethercote/servo,SimonSapin/servo,cbrewster/servo,KiChjang/servo,ConnorGBrewster/servo,fiji-flo/servo,pyfisch/servo,paulrouget/servo,paulrouget/servo,emilio/servo,sadmansk/servo,anthgur/servo,canaltinova/servo,nnethercote/servo,anthgur/servo,paulrouget/servo,SimonSapin/servo,pyfisch/servo,paulrouget/servo,sadmansk/servo,mbrubeck/servo,notriddle/servo,thiagopnts/servo,peterjoel/servo,szeged/servo,peterjoel/servo,canaltinova/servo,mattnenterprise/servo,anthgur/servo,dati91/servo,thiagopnts/servo,emilio/servo,larsbergstrom/servo,szeged/servo,upsuper/servo,larsbergstrom/servo,saneyuki/servo,notriddle/servo,jimberlage/servo,DominoTree/servo,anthgur/servo,upsuper/servo,pyfisch/servo,notriddle/servo,upsuper/servo,nnethercote/servo,saneyuki/servo,szeged/servo,sadmansk/servo,peterjoel/servo,jimberlage/servo,saneyuki/servo,mbrubeck/servo,emilio/servo,paulrouget/servo,SimonSapin/servo,SimonSapin/servo,cbrewster/servo,fiji-flo/servo,saneyuki/servo,thiagopnts/servo,peterjoel/servo,saneyuki/servo,pyfisch/servo,mbrubeck/servo,SimonSapin/servo,anthgur/servo,mbrubeck/servo,DominoTree/servo,DominoTree/servo,saneyuki/servo,paulrouget/servo,emilio/servo,DominoTree/servo,pyfisch/servo,larsbergstrom/servo,KiChjang/servo,cbrewster/servo,cbrewster/servo,thiagopnts/servo,cbrewster/servo,pyfisch/servo,upsuper/servo,mattnenterprise/servo,ConnorGBrewster/servo,nnethercote/servo,cbrewster/servo,splav/servo,emilio/servo,mattnenterprise/servo,mattnenterprise/servo,jimberlage/servo,canaltinova/servo,splav/servo,larsbergstrom/servo,thiagopnts/servo,cbrewster/servo,SimonSapin/servo,szeged/servo,saneyuki/servo,larsbergstrom/servo,avadacatavra/servo,avadacatavra/servo,KiChjang/servo,thiagopnts/servo,szeged/servo,pyfisch/servo,splav/servo,ConnorGBrewster/servo,canaltinova/servo,saneyuki/servo,dati91/servo,fiji-flo/servo,fiji-flo/servo,nnethercote/servo,avadacatavra/servo,splav/servo,ConnorGBrewster/servo,szeged/servo,dati91/servo,KiChjang/servo,notriddle/servo,larsbergstrom/servo,larsbergstrom/servo,upsuper/servo,szeged/servo,nnethercote/servo,KiChjang/servo,mattnenterprise/servo,larsbergstrom/servo,peterjoel/servo,jimberlage/servo,notriddle/servo,peterjoel/servo,larsbergstrom/servo,saneyuki/servo,mattnenterprise/servo,DominoTree/servo,anthgur/servo,DominoTree/servo,DominoTree/servo,jimberlage/servo,mattnenterprise/servo,thiagopnts/servo,DominoTree/servo,notriddle/servo,canaltinova/servo,szeged/servo,saneyuki/servo,paulrouget/servo,ConnorGBrewster/servo,peterjoel/servo,mbrubeck/servo,notriddle/servo,upsuper/servo,splav/servo,mattnenterprise/servo,avadacatavra/servo,peterjoel/servo,sadmansk/servo,szeged/servo,upsuper/servo,paulrouget/servo,ConnorGBrewster/servo,avadacatavra/servo,fiji-flo/servo,notriddle/servo,paulrouget/servo,avadacatavra/servo,DominoTree/servo,nnethercote/servo,sadmansk/servo,cbrewster/servo