util: Add a method to push all elements from another doubly-linked list without any moves.
util: Add a method to push all elements from another doubly-linked list
without any moves.

This is tracked upstream as Rust bug #18402.

kindersung/servo,fiji-flo/servo,nrc/servo,dvberkel/servo,pgonda/servo,rentongzhang/servo,upsuper/servo,tafia/servo,anthgur/servo,A-deLuna/servo,huonw/servo,saneyuki/servo,caldwell/servo,walac/servo,indykish/servo,tempbottle/servo,dmarcos/servo,dagnir/servo,luniv/servo,dati91/servo,fiji-flo/servo,splav/servo,michaelwu/servo,GyrosOfWar/servo,steveklabnik/servo,cbrewster/servo,Shraddha512/servo,nnethercote/servo,nrc/servo,GreenRecycleBin/servo,tafia/servo,wpgallih/servo,zhangjunlei26/servo,froydnj/servo,huonw/servo,CJ8664/servo,KiChjang/servo,nick-thompson/servo,echochamber/servo,meh/servo,karlito40/servo,eddyb/servo,sadmansk/servo,GreenRecycleBin/servo,deokjinkim/servo,rixrix/servo,avadacatavra/servo,vks/servo,g-k/servo,karlito40/servo,tafia/servo,caldwell/servo,nerith/servo,pgonda/servo,jimberlage/servo,kindersung/servo,ruud-v-a/servo,runarberg/servo,meh/servo,snf/servo,saratang/servo,aweinstock314/servo,zhangjunlei26/servo,mattnenterprise/servo,notriddle/servo,indykish/servo,GreenRecycleBin/servo,tempbottle/servo,indykish/servo,mt2d2/servo,bjwbell/servo,samfoo/servo,canaltinova/servo,brendandahl/servo,zentner-kyle/servo,akosel/servo,evilpie/servo,aweinstock314/servo,steveklabnik/servo,froydnj/servo,g-k/servo,nnethercote/servo,GyrosOfWar/servo,codemac/servo,cbrewster/servo,fiji-flo/servo,pgonda/servo,rnestler/servo,snf/servo,dvberkel/servo,aidanhs/servo,dhananjay92/servo,mukilan/servo,sadmansk/servo,jdramani/servo,wartman4404/servo,larsbergstrom/servo,rixrix/servo,nnethercote/servo,DominoTree/servo,dmarcos/servo,boghison/servo,rixrix/servo,snf/servo,mattnenterprise/servo,ConnorGBrewster/servo,mattnenterprise/servo,evilpie/servo,michaelwu/servo,brendandahl/servo,avadacatavra/servo,akosel/servo,larsbergstrom/servo,evilpie/servo,anthgur/servo,saneyuki/servo,rixrix/servo,walac/servo,GyrosOfWar/servo,KiChjang/servo,deokjinkim/servo,samfoo/servo,DominoTree/servo,A-deLuna/servo,huonw/servo,fiji-flo/servo,jgraham/servo,pgonda/servo,mbrubeck/servo,szeged/servo,splav/servo,szeged/servo,szeged/servo,s142857/servo,CJ8664/servo,luniv/servo,saratang/servo,mt2d2/servo,pyfisch/servo,hyowon/servo,peterjoel/servo,g-k/servo,vks/servo,deokjinkim/servo,hyowon/servo,tempbottle/servo,AnthonyBroadCrawford/servo,indykish/servo,j3parker/servo,brendandahl/servo,s142857/servo,paulrouget/servo,steveklabnik/servo,paulrouget/servo,saneyuki/servo,bfrohs/servo,pyfisch/servo,rentongzhang/servo,pgonda/servo,boghison/servo,echochamber/servo,avadacatavra/servo,peterjoel/servo,peterjoel/servo,karlito40/servo,wartman4404/servo,thiagopnts/servo,tempbottle/servo,eddyb/servo,aweinstock314/servo,s142857/servo,vks/servo,caldwell/servo,mt2d2/servo,luniv/servo,nick-thompson/servo,luniv/servo,snf/servo,rnestler/servo,youprofit/servo,boghison/servo,splav/servo,mattnenterprise/servo,rnestler/servo,indykish/servo,tempbottle/servo,WriterOfAlicrow/servo,froydnj/servo,mukilan/servo,szeged/servo,bfrohs/servo,peterjoel/servo,dhananjay92/servo,rnestler/servo,mt2d2/servo,mdibaiee/servo,nrc/servo,thiagopnts/servo,bjwbell/servo,nick-thompson/servo,szeged/servo,meh/servo,splav/servo,dati91/servo,avadacatavra/servo,larsbergstrom/servo,mbrubeck/servo,Shraddha512/servo,bfrohs/servo,peterjoel/servo,dvberkel/servo,echochamber/servo,nick-thompson/servo,dati91/servo,walac/servo,KiChjang/servo,zentner-kyle/servo,nick-thompson/servo,rentongzhang/servo,GreenRecycleBin/servo,evilpie/servo,nick-thompson/servo,emilio/servo,Adenilson/prototype-viewing-distance,tafia/servo,rnestler/servo,anthgur/servo,luniv/servo,anthgur/servo,dmarcos/servo,caldwell/servo,DominoTree/servo,Adenilson/prototype-viewing-distance,shrenikgala/servo,tempbottle/servo,peterjoel/servo,wpgallih/servo,nerith/servo,nnethercote/servo,tschneidereit/servo,nnethercote/servo,upsuper/servo,szeged/servo,rnestler/servo,larsbergstrom/servo,froydnj/servo,evilpie/servo,bjwbell/servo,jimberlage/servo,splav/servo,ryancanhelpyou/servo,jimberlage/servo,mattnenterprise/servo,nnethercote/servo,aidanhs/servo,tschneidereit/servo,deokjinkim/servo,dati91/servo,shrenikgala/servo,WriterOfAlicrow/servo,walac/servo,canaltinova/servo,KiChjang/servo,ConnorGBrewster/servo,youprofit/servo,chotchki/servo,steveklabnik/servo,nnethercote/servo,mukilan/servo,pyecs/servo,boghison/servo,jdramani/servo,jimberlage/servo,canaltinova/servo,dati91/servo,meh/servo,youprofit/servo,aidanhs/servo,deokjinkim/servo,zentner-kyle/servo,j3parker/servo,vks/servo,DominoTree/servo,dmarcos/servo,codemac/servo,larsbergstrom/servo,Shraddha512/servo,notriddle/servo,notriddle/servo,jimberlage/servo,saneyuki/servo,froydnj/servo,jlegendary/servo,upsuper/servo,nnethercote/servo,upsuper/servo,peterjoel/servo,ryancanhelpyou/servo,rentongzhang/servo,brendandahl/servo,nerith/servo,pgonda/servo,SimonSapin/servo,splav/servo,echochamber/servo,rentongzhang/servo,boghison/servo,emilio/servo,jgraham/servo,huonw/servo,mattnenterprise/servo,tschneidereit/servo,g-k/servo,pyfisch/servo,anthgur/servo,Adenilson/prototype-viewing-distance,WriterOfAlicrow/servo,fiji-flo/servo,runarberg/se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foo/servo,bfrohs/servo,KiChjang/servo,dmarcos/servo,DominoTree/servo,cbrewster/servo,WriterOfAlicrow/servo,indykish/servo,peterjoel/servo,hyowon/servo,steveklabnik/servo,vks/servo,mdibaiee/servo,KiChjang/servo,boghison/servo,wpgallih/servo,dhananjay92/servo,huonw/servo,rentongzhang/servo,ruud-v-a/servo,mbrubeck/servo,splav/servo,caldwell/servo,cbrewster/servo,huonw/servo,jimberlage/servo,bjwbell/servo,nick-thompson/servo,runarberg/servo,anthgur/servo,echochamber/servo,splav/servo,saratang/servo,rixrix/servo,jlegendary/servo,paulrouget/servo,jlegendary/servo,peterjoel/servo,tafia/servo,AnthonyBroadCrawford/servo,Shraddha512/servo,snf/servo,notriddle/servo,ConnorGBrewster/servo,paulrouget/servo,dagnir/servo,wartman4404/servo,brendandahl/servo,g-k/servo,dvberkel/servo,cbrewster/servo,WriterOfAlicrow/servo,RenaudParis/servo,notriddle/servo,saneyuki/servo,larsbergstrom/servo,A-deLuna/servo,bfrohs/servo,emilio/servo,CJ8664/servo,j3parker/servo,tempbottle/servo,kindersung/servo,pyfisch/servo,pyecs/servo,Adenilson/prototype-viewing-distance,nrc/servo,ConnorGBrewster/servo,caldwell/servo,runarberg/servo,GreenRecycleBin/servo,upsuper/servo,luniv/servo,jimberlage/servo,mt2d2/servo,nerith/servo,AnthonyBroadCrawford/servo,ryancanhelpyou/servo,pyecs/servo,dvberkel/servo,ConnorGBrewster/servo,rnestler/servo,jlegendary/servo,runarberg/servo,codemac/servo,AnthonyBroadCrawford/servo,zentner-kyle/servo,deokjinkim/servo,ruud-v-a/servo,thiagopnts/servo,jimberlage/servo,Shraddha512/servo,pyecs/servo,dmarcos/servo,akosel/servo,ryancanhelpyou/servo,zhangjunlei26/servo,GyrosOfWar/servo,aidanhs/servo,paulrouget/servo,walac/servo,youprofit/servo,codemac/servo,tafia/servo,wartman4404/servo,ConnorGBrewster/servo,codemac/servo,youprofit/servo,RenaudParis/servo,runarberg/servo,nnethercote/servo,cbrewster/servo,RenaudParis/servo,sadmansk/servo,deokjinkim/servo,srbhklkrn/SERVOENGINE,CJ8664/servo,snf/servo,ryancanhelpyou/servo,dati91/servo,bjwbell/servo,bjwbell/servo,srbhklkrn/SERVOENGINE,wpgallih/servo