Add comments to make erl_prim_loader primary archive handling more readable
Add comments to make erl_prim_loader primary archive handling more readable

This commit introduces no functional change. It only adds comments and
changes some function/variable names.

krishnakumar4a4/otp,palas/otp,krishnakumar4a4/otp,theom/otp,gjaldon/otp,ader1990/otp,platinumthinker/otp,c-rack/otp,theom/otp,lhslll/otp,jamesruan/otp,jemsbhai/otp,bsmr-erlang/otp,lightcyphers/otp,release-project/otp,cobusc/otp,riverrun/otp,c-rack/otp,bugs-erlang-org/otp,palas/otp,platinumthinker/otp,bjorng/otp,erlang/otp,bugs-erlang-org/otp,RoadRunnr/otp,mikpe/otp,vinoski/otp,lemenkov/otp,RGafiyatullin/otp,derek121/otp,ader1990/otp,electricimp/otp,lianghaivv/otp,bjorng/otp,sammoth-wazoku/otp,uabboli/otp,yangchengjian/otp,RichMorin/otp,psyeugenic/otp,haguenau/otp,psyeugenic/otp,marquisthunder/otp,beni55/otp,paladim/otp,weisslj/otp,RJ/otp,c-rack/otp,vladdu/otp,dumbbell/otp,massemanet/otp,NOMORECOFFEE/otp,vic/otp,haguenau/otp,potatosalad/otp,stolen/otp,dumbbell/otp,vladdu/otp,rlipscombe/otp,lightcyphers/otp,klarna/otp,mikpe/otp,saleyn/otp,RJ/otp,RaimoNiskanen/otp,erlang/otp,enikki/otp,potatosalad/otp,uabboli/otp,yangchengjian/otp,krishnakumar4a4/otp,kvakvs/otp,lhslll/otp,hairyhum/otp,jemsbhai/otp,falkevik/otp,bugs-erlang-org/otp,weisslj/otp,RaimoNiskanen/otp,lhslll/otp,gjaldon/otp,bsmr-erlang/otp,benoitc/otp-1,dgud/otp,ahmedshafeeq/otp,haguenau/otp,bjorng/otp,mujiatong/otp,marquisthunder/otp,legoscia/otp,potatosalad/otp,release-project/otp,GinjaNinja32/otp,psyeugenic/otp,lemenkov/otp,cnbin/otp,erlang/otp,Teino1978-Corp/erlang-otp,jj1bdx/otp,isvilen/otp,entropiae/otp,uabboli/otp,sitexa/otp,dgud/otp,RichMorin/otp,jinshana/otp,emacsmirror/erlang,bernardd/otp,RoadRunnr/otp,bsmr-erlang/otp,johanclaesson/otp,electricimp/otp,entropiae/otp,jemsbhai/otp,RichMorin/otp,palas/otp,lucafavatella/otp,derek121/otp,vinoski/otp,beni55/otp,vic/otp,Teino1978-Corp/erlang-otp,schlagert/otp,falkevik/otp,RGafiyatullin/otp,platinumthinker/otp,paulcager/otp,lightcyphers/otp,sdebnath/otp,RichMorin/otp,marquisthunder/otp,rlipscombe/otp,stolen/otp,RaimoNiskanen/otp,ader1990/otp,fenollp/otp,jj1bdx/otp,paulcager/otp,beni55/otp,vic/otp,derek121/otp,kvakvs/otp,lightcyphers/otp,goertzenator/otp,stolen/otp,RoadRunnr/otp,jamesruan/otp,theom/otp,legoscia/otp,lucafavatella/otp,marquisthunder/otp,jemsbhai/otp,lianghaivv/otp,msantos/otp,awetzel/otp,sammoth-wazoku/otp,kvakvs/otp,lucafavatella/otp,aboroska/otp,schlagert/otp,lianghaivv/otp,tuncer/otp,NOMORECOFFEE/otp,enikki/otp,jj1bdx/otp,bjorng/otp,mujiatong/otp,Teino1978-Corp/otp,jamesruan/otp,NOMORECOFFEE/otp,lemenkov/otp,theom/otp,cnbin/otp,erlang/otp,rlipscombe/otp,hairyhum/otp,weisslj/otp,marquisthunder/otp,RaimoNiskanen/otp,platinumthinker/otp,basho/otp,vinoski/otp,ahmedshafeeq/otp,haguenau/otp,NOMORECOFFEE/otp,Teino1978-Corp/erlang-otp,johanclaesson/otp,lrascao/otp,fenollp/otp,legoscia/otp,emacsmirror/erlang,lhslll/otp,mujiatong/otp,aboroska/otp,lantti/otp,aboroska/otp,cobusc/otp,mujiatong/otp,GinjaNinja32/otp,basho/otp,sitexa/otp,fenollp/otp,fenollp/otp,tuncer/otp,falkevik/otp,msantos/otp,ahmedshafeeq/otp,lantti/otp,lrascao/otp,klarna/otp,cnbin/otp,jinshana/otp,matwey/otp,awetzel/otp,beni55/otp,falkevik/otp,matwey/otp,mujiatong/otp,VincentHHL/otp,uabboli/otp,weisslj/otp,derek121/otp,RoadRunnr/otp,marquisthunder/otp,palas/otp,neeraj9/otp,goertzenator/otp,entropiae/otp,c-rack/otp,potatosalad/otp,neeraj9/otp,paladim/otp,c-rack/otp,vic/otp,erlang/otp,klarna/otp,release-project/otp,bernardd/otp,goertzenator/otp,potatosalad/otp,bsmr-erlang/otp,entropiae/otp,lhslll/otp,c-rack/otp,bjorng/otp,kvakvs/otp,weisslj/otp,vic/otp,RGafiyatullin/otp,vinoski/otp,sammoth-wazoku/otp,lantti/otp,dgud/otp,sammoth-wazoku/otp,lrascao/otp,electricimp/otp,theom/otp,gjaldon/otp,lantti/otp,weisslj/otp,beni55/otp,dgud/otp,cobusc/otp,msantos/otp,RaimoNiskanen/otp,goertzenator/otp,isvilen/otp,kvakvs/otp,saleyn/otp,klarna/otp,emacsmirror/erlang,cnbin/otp,lrascao/otp,neeraj9/otp,neeraj9/otp,bjorng/otp,GinjaNinja32/otp,lucafavatella/otp,sdebnath/otp,vladdu/otp,getong/otp,enikki/otp,hairyhum/otp,bugs-erlang-org/otp,dgud/otp,sammoth-wazoku/otp,klarna/otp,ader1990/otp,jamesruan/otp,getong/otp,johanclaesson/otp,palas/otp,klarna/otp,dgud/otp,massemanet/otp,enikki/otp,neeraj9/otp,jinshana/otp,GinjaNinja32/otp,cnbin/otp,jinshana/otp,msantos/otp,bernardd/otp,kvakvs/otp,jj1bdx/otp,jemsbhai/otp,klarna/otp,RoadRunnr/otp,jinshana/otp,lucafavatella/otp,ferd/otp,isvilen/otp,isvilen/otp,lhslll/otp,lightcyphers/otp,johanclaesson/otp,emacsmirror/erlang,emile/otp,theom/otp,RoadRunnr/otp,basho/otp,RJ/otp,dgud/otp,yangchengjian/otp,lrascao/otp,matwey/otp,lemenkov/otp,release-project/otp,mikpe/otp,matwey/otp,dumbbell/otp,GinjaNinja32/otp,RoadRunnr/otp,basho/otp,palas/otp,saleyn/otp,marquisthunder/otp,palas/otp,ader1990/otp,saleyn/otp,vinoski/otp,msantos/otp,sitexa/otp,lantti/otp,rlipscombe/otp,tuncer/otp,paladim/otp,lemenkov/otp,derek121/otp,rlipscombe/otp,entropiae/otp,yangchengjian/otp,g-andrade/otp,tuncer/otp,paulcager/otp,RichMorin/otp,sdebnath/otp,potatosalad/otp,vic/otp,saleyn/otp,Teino1978-Corp/erlang-otp,derek121/otp,ahmedshafeeq/otp,psyeugenic/otp,emacsmirror/erlang,RoadRunnr/otp,vladdu/otp,entropiae/otp,bjorng/otp,GinjaNinja32/otp,falkevik/otp,platinumthinker/otp,riverrun/otp,riverrun/otp,c-rack/otp,beni55/otp,massemanet/otp,vladdu/otp,getong/otp,ader1990/otp,lemenkov/otp,riverrun/otp,RGafiyatullin/otp,sammoth-wazoku/otp,GinjaNinja32/otp,hairyhum/otp,theom/otp,massemanet/otp,getong/otp,gjaldon/otp,GinjaNinja32/otp,NOMORECOFFEE/otp,VincentHHL/otp,dumbbell/otp,getong/otp,g-andrade/otp,getong/otp,krishnakumar4a4/otp,vinoski/otp,goertzenator/otp,johanclaesson/otp,lemenkov/otp,getong/otp,platinumthinker/otp,jinshana/otp,bsmr-erlang/otp,cobusc/otp,jj1bdx/otp,uabboli/otp,legoscia/otp,c-rack/otp,fenollp/otp,erlang/otp,schlagert/otp,awetzel/otp,erlang/otp,yangchengjian/otp,g-andrade/otp,mikpe/otp,lemenkov/otp,paulcager/otp,uabboli/otp,legoscia/otp,enikki/otp,sitexa/otp,johanclaesson/otp,mikpe/otp,getong/otp,matwey/otp,msantos/otp,RGafiyatullin/otp,massemanet/otp,release-project/otp,vinoski/otp,dumbbell/otp,awetzel/otp,beni55/otp,gjaldon/otp,massemanet/otp,electricimp/otp,basho/otp,jamesruan/otp,massemanet/otp,emacsmirror/erlang,benoitc/otp-1,uabboli/otp,RoadRunnr/otp,rlipscombe/otp,bernardd/otp,lrascao/otp,tuncer/otp,schlagert/otp,electricimp/otp,Teino1978-Corp/otp,mujiatong/otp,benoitc/otp-1,emile/otp,RaimoNiskanen/otp,psyeugenic/otp,vinoski/otp,basho/otp,legoscia/otp,RJ/otp,VincentHHL/otp,NOMORECOFFEE/otp,saleyn/otp,emile/otp,platinumthinker/otp,RichMorin/otp,msantos/otp,paladim/otp,dgud/otp,Teino1978-Corp/erlang-otp,lucafavatella/otp,bernardd/otp,lucafavatella/otp,g-andrade/otp,bernardd/otp,rlipscombe/otp,VincentHHL/otp,ferd/otp,VincentHHL/otp,bernardd/otp,aboroska/otp,riverrun/otp,emacsmirror/erlang,jemsbhai/otp,cnbin/otp,hairyhum/otp,paladim/otp,fenollp/otp,bsmr-erlang/otp,jj1bdx/otp,entropiae/otp,ader1990/otp,Teino1978-Corp/otp,neeraj9/otp,saleyn/otp,haguenau/otp,enikki/otp,g-andrade/otp,release-project/otp,riverrun/otp,RJ/otp,emile/otp,falkevik/otp,VincentHHL/otp,bsmr-erlang/otp,benoitc/otp-1,basho/otp,RGafiyatullin/otp,sammoth-wazoku/otp,aboroska/otp,rlipscombe/otp,potatosalad/otp,lrascao/otp,isvilen/otp,derek121/otp,RJ/otp,vladdu/otp,ahmedshafeeq/otp,RaimoNiskanen/otp,lantti/otp,benoitc/otp-1,jj1bdx/otp,bjorng/otp,legoscia/otp,electricimp/otp,potatosalad/otp,dumbbell/otp,Teino1978-Corp/otp,vinoski/otp,Teino1978-Corp/erlang-otp,ader1990/otp,awetzel/otp,VincentHHL/otp,schlagert/otp,RichMorin/otp,bugs-erlang-org/otp,riverrun/otp,RaimoNiskanen/otp,erlang/otp,falkevik/otp,ferd/otp,g-andrade/otp,awetzel/otp,benoitc/otp-1,lianghaivv/otp,dgud/otp,yangchengjian/otp,getong/otp,haguenau/otp,sdebnath/otp,stolen/otp,tuncer/otp,msantos/otp,psyeugenic/otp,jemsbhai/otp,falkevik/otp,RichMorin/otp,erlang/otp,RaimoNiskanen/otp,fenollp/otp,awetzel/otp,entropiae/otp,mikpe/otp,dgud/otp,derek121/otp,gjaldon/otp,potatosalad/otp,ferd/otp,lantti/otp,krishnakumar4a4/otp,schlagert/otp,ferd/otp,erlang/otp,bsmr-erlang/otp,hairyhum/otp,matwey/otp,neeraj9/otp,mujiatong/otp,lightcyphers/otp,uabboli/otp,jamesruan/otp,lrascao/otp,johanclaesson/otp,isvilen/otp,emacsmirror/erlang,goertzenator/otp,jj1bdx/otp,enikki/otp,johanclaesson/otp,RJ/otp,benoitc/otp-1,psyeugenic/otp,fenollp/otp,paladim/otp,matwey/otp,release-project/otp,benoitc/otp-1,cobusc/otp,cnbin/otp,neeraj9/otp,Teino1978-Corp/otp,aboroska/otp,goertzenator/otp,emacsmirror/erlang,jemsbhai/otp,bjorng/otp,RGafiyatullin/otp,tuncer/otp,uabboli/otp,emile/otp,theom/otp,saleyn/otp,stolen/otp,mikpe/otp,klarna/otp,jj1bdx/otp,awetzel/otp,electricimp/otp,palas/otp,sitexa/otp,schlagert/otp,isvilen/otp,falkevik/otp,ferd/otp,aboroska/otp,jj1bdx/otp,goertzenator/otp,lrascao/otp,paulcager/otp,RJ/otp,Teino1978-Corp/otp,hairyhum/otp,sdebnath/otp,electricimp/otp,lhslll/otp,vic/otp,Teino1978-Corp/otp,sitexa/otp,bugs-erlang-org/otp,lianghaivv/otp,g-andrade/otp,haguenau/otp,jinshana/otp,ferd/otp,electricimp/otp,basho/otp,lianghaivv/otp,rlipscombe/otp,release-project/otp,vladdu/otp,stolen/otp,kvakvs/otp,goertzenator/otp,vladdu/otp,cobusc/otp,jamesruan/otp,Teino1978-Corp/erlang-otp,paladim/otp,aboroska/otp,saleyn/otp,release-project/otp,dumbbell/otp,jamesruan/otp,dumbbell/otp,fenollp/otp,lantti/otp,isvilen/otp,weisslj/otp,mikpe/otp,mikpe/otp,potatosalad/otp,vladdu/otp,basho/otp,marquisthunder/otp,bugs-erlang-org/otp,isvilen/otp,gjaldon/otp,emacsmirror/erlang,ahmedshafeeq/otp,lianghaivv/otp,bjorng/otp,vic/otp,isvilen/otp,schlagert/otp,massemanet/otp,Teino1978-Corp/erlang-otp,psyeugenic/otp,cnbin/otp,matwey/otp,yangchengjian/otp,tuncer/otp,hairyhum/otp,krishnakumar4a4/otp,lhslll/otp,kvakvs/otp,bugs-erlang-org/otp,platinumthinker/otp,bsmr-erlang/otp,emile/otp,dumbbell/otp,haguenau/otp,krishnakumar4a4/otp,dumbbell/otp,aboroska/otp,riverrun/otp,sitexa/otp,yangchengjian/otp,g-andrade/otp,lianghaivv/otp,beni55/otp,cobusc/otp,emile/otp,Teino1978-Corp/otp,g-andrade/otp,getong/otp,VincentHHL/otp,jinshana/otp,bernardd/otp,lightcyphers/otp,lucafavatella/otp,ferd/otp,RGafiyatullin/otp,mikpe/otp,bernardd/otp,massemanet/otp,rlipscombe/otp,legoscia/otp,ferd/otp,g-andrade/otp,sdebnath/otp,ahmedshafeeq/otp,stolen/otp,krishnakumar4a4/otp,sammoth-wazoku/otp,gjaldon/otp,NOMORECOFFEE/otp,mujiatong/otp,legoscia/otp,paulcager/otp,sdebnath/otp,cobusc/otp,stolen/otp,paulcager/otp,ahmedshafeeq/otp,weisslj/otp,NOMORECOFFEE/otp,emile/otp,kvakvs/otp,vinoski/otp,weisslj/otp,paladim/otp,ahmedshafeeq/otp,lightcyphers/otp,sdebnath/otp,emile/otp,enikki/otp,sitexa/otp,matwey/otp,paulcager/otp,tuncer/otp