fix(rustup): use module-level thread functions
fix(rustup): use module-level thread functions

mlalic/hyper,mneumann/hyper,manuel-woelker/hyper,achanda/hyper,markuskobler/hyper,giftcards/hyper,mitsuhiko/hyper,hyperium/hyper,fuchsnj/hyper,Ryman/hyper,hannobraun/hyper,reem/hyper,hyperium/hyper,nstoddard/hyper,rschulman/hyper,peterhj/hyper,lame-nickname/hyper,sfackler/hyper,Twey/hyper,pyfisch/hyper,hannobraun/hyper,mlalic/hyper,ianks/hyper,fengsp/hyper,mikedilger/hyper,youprofit/hyper,markuskobler/hyper,yangxingpping/hyper,softprops/hyper,golddranks/hyper,tshepang/hyper,tshepang/hyper,TimNN/hyper,Twey/hyper,nstoddard/hyper,steveklabnik/hyper,golddranks/hyper,bonifaido/hyper,Keats/hyper,hannobraun/hyper,hyperium/hyper,huonw/hyper,nickgonzales/hyper,tshepang/hyper,yazaddaruvala/hyper,fhahn/hyper,jmmaranan/hyper,tempbottle/hyper,markuskobler/hyper,Keats/hyper,yazaddaruvala/hyper,clatour/hyper,nickgonzales/hyper,erickt/hyper,mfeckie/hyper,golddranks/hyper,Keats/hyper,bheesham/hyper,Twey/hyper,nickgonzales/hyper,mre/hyper