Auto merge of #9187 - Ms2ger:script-comments, r=jdm
Auto merge of #9187 - Ms2ger:script-comments, r=jdm

Update specification references and TODO comments in HTMLScriptElement.

<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/servo/9187)
<!-- Reviewable:end -->

canaltinova/servo,sadmansk/servo,peterjoel/servo,anthgur/servo,CJ8664/servo,sadmansk/servo,upsuper/servo,cbrewster/servo,peterjoel/servo,emilio/servo,paulrouget/servo,rnestler/servo,nnethercote/servo,DominoTree/servo,szeged/servo,fiji-flo/servo,mattnenterprise/servo,jimberlage/servo,peterjoel/servo,DominoTree/servo,upsuper/servo,notriddle/servo,saneyuki/servo,mattnenterprise/servo,notriddle/servo,fiji-flo/servo,mbrubeck/servo,mattnenterprise/servo,emilio/servo,DominoTree/servo,mbrubeck/servo,saneyuki/servo,dati91/servo,rnestler/servo,KiChjang/servo,ConnorGBrewster/servo,szeged/servo,emilio/servo,szeged/servo,cbrewster/servo,szeged/servo,pyfisch/servo,fiji-flo/servo,splav/servo,ConnorGBrewster/servo,KiChjang/servo,cbrewster/servo,szeged/servo,KiChjang/servo,larsbergstrom/servo,nrc/servo,notriddle/servo,pyfisch/servo,splav/servo,saneyuki/servo,eddyb/servo,upsuper/servo,emilio/servo,cbrewster/servo,peterjoel/servo,avadacatavra/servo,thiagopnts/servo,nnethercote/servo,paulrouget/servo,nrc/servo,KiChjang/servo,ConnorGBrewster/servo,cbrewster/servo,DominoTree/servo,splav/servo,eddyb/servo,steveklabnik/servo,splav/servo,rnestler/servo,avadacatavra/servo,CJ8664/servo,larsbergstrom/servo,thiagopnts/servo,paulrouget/servo,emilio/servo,paulrouget/servo,upsuper/servo,CJ8664/servo,canaltinova/servo,DominoTree/servo,dsandeephegde/servo,splav/servo,fiji-flo/servo,DominoTree/servo,nnethercote/servo,anthgur/servo,mattnenterprise/servo,SimonSapin/servo,SimonSapin/servo,rnestler/servo,splav/servo,dsandeephegde/servo,CJ8664/servo,nrc/servo,anthgur/servo,dsandeephegde/servo,splav/servo,peterjoel/servo,thiagopnts/servo,anthgur/servo,eddyb/servo,KiChjang/servo,cbrewster/servo,mattnenterprise/servo,peterjoel/servo,splav/servo,peterjoel/servo,dsandeephegde/servo,saneyuki/servo,pyfisch/servo,KiChjang/servo,saneyuki/servo,canaltinova/servo,eddyb/servo,SimonSapin/servo,canaltinova/servo,peterjoel/servo,nnethercote/servo,dati91/servo,sadmansk/servo,CJ8664/servo,szeged/servo,emilio/servo,jimberlage/servo,jimberlage/servo,larsbergstrom/servo,paulrouget/servo,sadmansk/servo,mbrubeck/servo,avadacatavra/servo,nnethercote/servo,thiagopnts/servo,canaltinova/servo,thiagopnts/servo,steveklabnik/servo,dsandeephegde/servo,sadmansk/servo,dati91/servo,jimberlage/servo,fiji-flo/servo,eddyb/servo,jimberlage/servo,szeged/servo,eddyb/servo,splav/servo,SimonSapin/servo,dati91/servo,avadacatavra/servo,thiagopnts/servo,anthgur/servo,SimonSapin/servo,ConnorGBrewster/servo,larsbergstrom/servo,saneyuki/servo,emilio/servo,DominoTree/servo,paulrouget/servo,jimberlage/servo,fiji-flo/servo,steveklabnik/servo,SimonSapin/servo,ConnorGBrewster/servo,CJ8664/servo,avadacatavra/servo,paulrouget/servo,larsbergstrom/servo,saneyuki/servo,thiagopnts/servo,KiChjang/servo,larsbergstrom/servo,upsuper/servo,fiji-flo/servo,SimonSapin/servo,nnethercote/servo,szeged/servo,nnethercote/servo,pyfisch/servo,anthgur/servo,CJ8664/servo,steveklabnik/servo,mbrubeck/servo,nrc/servo,nnethercote/servo,saneyuki/servo,canaltinova/servo,rnestler/servo,sadmansk/servo,rnestler/servo,DominoTree/servo,mbrubeck/servo,saneyuki/servo,larsbergstrom/servo,pyfisch/servo,ConnorGBrewster/servo,peterjoel/servo,rnestler/servo,dsandeephegde/servo,thiagopnts/servo,anthgur/servo,pyfisch/servo,dsandeephegde/servo,steveklabnik/servo,emilio/servo,emilio/servo,canaltinova/servo,pyfisch/servo,cbrewster/servo,nnethercote/servo,jimberlage/servo,paulrouget/servo,KiChjang/servo,emilio/servo,notriddle/servo,KiChjang/servo,avadacatavra/servo,CJ8664/servo,peterjoel/servo,splav/servo,DominoTree/servo,steveklabnik/servo,pyfisch/servo,eddyb/servo,mbrubeck/servo,dsandeephegde/servo,mbrubeck/servo,szeged/servo,szeged/servo,saneyuki/servo,dati91/servo,avadacatavra/servo,SimonSapin/servo,eddyb/servo,notriddle/servo,rnestler/servo,notriddle/servo,anthgur/servo,cbrewster/servo,mbrubeck/servo,ConnorGBrewster/servo,larsbergstrom/servo,canaltinova/servo,nrc/servo,ConnorGBrewster/servo,nnethercote/servo,pyfisch/servo,paulrouget/servo,upsuper/servo,dati91/servo,notriddle/servo,fiji-flo/servo,upsuper/servo,KiChjang/servo,nrc/servo,mattnenterprise/servo,larsbergstrom/servo,nrc/servo,notriddle/servo,dati91/servo,avadacatavra/servo,sadmansk/servo,dati91/servo,mattnenterprise/servo,mattnenterprise/servo,DominoTree/servo,paulrouget/servo,jimberlage/servo,steveklabnik/servo,jimberlage/servo,notriddle/servo,notriddle/servo,upsuper/servo,sadmansk/servo,larsbergstrom/servo,pyfisch/servo