Remove AbstractNode::followed_by_doctype and AbstractNode::inclusively_followed_by_doctype in favour of iterators over following siblings.
Remove AbstractNode::followed_by_doctype and AbstractNode::inclusively_followed_by_doctype in favour of iterators over following siblings.

bjwbell/servo,pyecs/servo,emilio/servo,WriterOfAlicrow/servo,nick-thompson/servo,rnestler/servo,chotchki/servo,GreenRecycleBin/servo,dagnir/servo,paulrouget/servo,j3parker/servo,anthgur/servo,fiji-flo/servo,saneyuki/servo,karlito40/servo,nick-thompson/servo,jdramani/servo,tempbottle/servo,larsbergstrom/servo,thiagopnts/servo,mukilan/servo,CJ8664/servo,snf/servo,chotchki/servo,mt2d2/servo,bjwbell/servo,codemac/servo,SimonSapin/servo,saneyuki/servo,eddyb/servo,dvberkel/servo,nerith/servo,juzer10/servo,mukilan/servo,RenaudParis/servo,A-deLuna/servo,tempbottle/servo,meh/servo,s142857/servo,pgonda/servo,peterjoel/servo,seanmonstar/servo,dhananjay92/servo,vks/servo,wartman4404/servo,tafia/servo,peterjoel/servo,mbrubeck/servo,WriterOfAlicrow/servo,sadmansk/servo,saratang/servo,pyfisch/servo,shrenikgala/servo,dati91/servo,KiChjang/servo,evilpie/servo,jimberlage/servo,mdibaiee/servo,boghison/servo,anthgur/servo,anthgur/servo,fiji-flo/servo,thiagopnts/servo,zhangjunlei26/servo,Adenilson/prototype-viewing-distance,seanmonstar/servo,samfoo/servo,rixrix/servo,zentner-kyle/servo,RenaudParis/servo,nnethercote/servo,KiChjang/servo,wpgallih/servo,mt2d2/servo,froydnj/servo,codemac/servo,upsuper/servo,ryancanhelpyou/servo,walac/servo,sadmansk/servo,zhangjunlei26/servo,avadacatavra/servo,runarberg/servo,snf/servo,fiji-flo/servo,zhangjunlei26/servo,mdibaiee/servo,Shraddha512/servo,paulrouget/servo,AnthonyBroadCrawford/servo,rentongzhang/servo,szeged/servo,chotchki/servo,froydnj/servo,paulrouget/servo,walac/servo,dsandeephegde/servo,zentner-kyle/servo,rentongzhang/servo,Adenilson/prototype-viewing-distance,froydnj/servo,notriddle/servo,steveklabnik/servo,ryancanhelpyou/servo,tempbottle/servo,dhananjay92/servo,deokjinkim/servo,rnestler/servo,echochamber/servo,rnestler/servo,A-deLuna/servo,g-k/servo,CJ8664/servo,RenaudParis/servo,mattnenterprise/servo,Adenilson/prototype-viewing-distance,dhananjay92/servo,nerith/servo,indykish/servo,s142857/servo,dagnir/servo,shrenikgala/servo,nick-thompson/servo,zhangjunlei26/servo,sadmansk/servo,Adenilson/prototype-viewing-distance,indykish/servo,jimberlage/servo,mattnenterprise/servo,jlegendary/servo,nerith/servo,CJ8664/servo,saneyuki/servo,jlegendary/servo,GreenRecycleBin/servo,pyfisch/servo,akosel/servo,bfrohs/servo,dmarcos/servo,s142857/servo,cbrewster/servo,wpgallih/servo,ConnorGBrewster/servo,tafia/servo,dagnir/servo,luniv/servo,nnethercote/servo,jgraham/servo,KiChjang/servo,youprofit/servo,youprofit/servo,AnthonyBroadCrawford/servo,cbrewster/servo,dagnir/servo,ruud-v-a/servo,g-k/servo,juzer10/servo,vks/servo,thiagopnts/servo,tafia/servo,deokjinkim/servo,indykish/servo,runarberg/servo,eddyb/servo,chotchki/servo,pyecs/servo,eddyb/servo,splav/servo,youprofit/servo,ryancanhelpyou/servo,RenaudParis/servo,g-k/servo,meh/servo,pgonda/servo,dati91/servo,pyfisch/servo,snf/servo,caldwell/servo,dhananjay92/servo,youprofit/servo,paulrouget/servo,aweinstock314/servo,g-k/servo,fiji-flo/servo,aweinstock314/servo,splav/servo,A-deLuna/servo,zhangjunlei26/servo,evilpie/servo,nrc/servo,rentongzhang/servo,jdramani/servo,nnethercote/servo,aidanhs/servo,froydnj/servo,sadmansk/servo,GreenRecycleBin/servo,nrc/servo,codemac/servo,larsbergstrom/servo,peterjoel/servo,pyfisch/servo,avadacatavra/servo,paulrouget/servo,kindersung/servo,splav/servo,karlito40/servo,jdramani/servo,Adenilson/prototype-viewing-distance,wpgallih/servo,echochamber/servo,Adenilson/prototype-viewing-distance,jlegendary/servo,ConnorGBrewster/servo,splav/servo,dvberkel/servo,pyecs/servo,nnethercote/servo,jimberlage/servo,saratang/servo,anthgur/servo,brendandahl/servo,dsandeephegde/servo,splav/servo,upsuper/servo,rentongzhang/servo,szeged/servo,rnestler/servo,avadacatavra/servo,canaltinova/servo,splav/servo,aweinstock314/servo,luniv/servo,WriterOfAlicrow/servo,KiChjang/servo,DominoTree/servo,KiChjang/servo,steveklabnik/servo,juzer10/servo,wpgallih/servo,KiChjang/servo,larsbergstrom/servo,vks/servo,srbhklkrn/SERVOENGINE,nrc/servo,shrenikgala/servo,RenaudParis/servo,evilpie/servo,dhananjay92/servo,seanmonstar/servo,mukilan/servo,dvberkel/servo,dati91/servo,SimonSapin/servo,dvberkel/servo,notriddle/servo,jgraham/servo,nrc/servo,aidanhs/servo,zentner-kyle/servo,indykish/servo,tschneidereit/servo,snf/servo,bfrohs/servo,dagnir/servo,rentongzhang/servo,s142857/servo,Shraddha512/servo,akosel/servo,upsuper/servo,dsandeephegde/servo,echochamber/servo,dhananjay92/servo,j3parker/servo,thiagopnts/servo,kindersung/servo,fiji-flo/servo,seanmonstar/servo,steveklabnik/servo,WriterOfAlicrow/servo,GreenRecycleBin/servo,youprofit/servo,eddyb/servo,dsandeephegde/servo,GreenRecycleBin/servo,nnethercote/servo,deokjinkim/servo,steveklabnik/servo,paulrouget/servo,mukilan/servo,mdibaiee/servo,akosel/servo,A-deLuna/servo,peterjoel/servo,ruud-v-a/servo,notriddle/servo,rixrix/servo,samfoo/servo,michaelwu/servo,brendandahl/servo,walac/servo,tafia/servo,mattnenterprise/servo,canaltinova/servo,mattnenterprise/servo,samfoo/servo,rnestler/servo,akosel/servo,szeged/servo,saratang/s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,sadmansk/servo,rixrix/servo,eddyb/servo,sadmansk/servo,froydnj/servo,upsuper/servo,peterjoel/servo,boghison/servo,evilpie/servo,nrc/servo,j3parker/servo,nick-thompson/servo,eddyb/servo,huonw/servo,mdibaiee/servo,GyrosOfWar/servo,nerith/servo,upsuper/servo,GreenRecycleBin/servo,runarberg/servo,dsandeephegde/servo,thiagopnts/servo,deokjinkim/servo,dati91/servo,jdramani/servo,saneyuki/servo,tschneidereit/servo,dati91/servo,mdibaiee/servo,nick-thompson/servo,deokjinkim/servo,srbhklkrn/SERVOENGINE,bjwbell/servo,evilpie/servo,larsbergstrom/servo,mt2d2/servo,pyecs/servo,cbrewster/servo,chotchki/servo,cbrewster/servo,saneyuki/servo,peterjoel/servo,indykish/servo,srbhklkrn/SERVOENGINE,avadacatavra/servo,aidanhs/servo,aweinstock314/servo,echochamber/servo,Shraddha512/servo,jimberlage/servo,seanmonstar/servo,akosel/servo,GreenRecycleBin/servo,mt2d2/servo,tschneidereit/servo,ConnorGBrewster/servo,SimonSapin/servo,AnthonyBroadCrawford/servo,mrobinson/servo,Shraddha512/servo,thiagopnts/servo,jlegendary/servo,tempbottle/servo,wpgallih/servo,DominoTree/servo,mdibaiee/servo,AnthonyBroadCrawford/servo,thiagopnts/servo,SimonSapin/servo,ryancanhelpyou/servo,aidanhs/servo,evilpie/servo,froydnj/servo,bfrohs/servo,nrc/servo,pyfisch/servo,nerith/servo,rixrix/servo,zentner-kyle/servo,dmarcos/servo,SimonSapin/servo,canaltinova/servo,michaelwu/servo,RenaudParis/servo,emilio/servo,paulrouget/servo,kindersung/servo,tschneidereit/servo,nick-thompson/servo,boghison/servo,karlito40/servo,paulrouget/servo,fiji-flo/servo,g-k/servo,mt2d2/servo,nnethercote/servo,aweinstock314/servo,dmarcos/servo,pgonda/servo,rixrix/servo,CJ8664/servo,rixrix/servo,steveklabnik/servo,KiChjang/servo,michaelwu/servo,echochamber/servo,paulrouget/servo,meh/servo,srbhklkrn/SERVOENGINE,peterjoel/servo,A-deLuna/servo,avadacatavra/servo,huonw/servo,bjwbell/servo,kindersung/servo,ConnorGBrewster/servo,aidanhs/servo,shrenikgala/servo,jdramani/servo,dati91/servo,notriddle/servo,GyrosOfWar/servo,jimberlage/servo,canaltinova/servo,mt2d2/servo,upsuper/servo,jgraham/servo,dsandeephegde/servo,karlito40/servo,codemac/servo,hyowon/servo,wpgallih/servo,cbrewster/servo,dmarcos/servo,DominoTree/servo,bjwbell/servo,peterjoel/servo,saneyuki/servo,snf/servo,juzer10/servo,brendandahl/servo,caldwell/servo,nerith/servo,bjwbell/servo,pgonda/servo