Makes the asset cache faster (#35003)
Makes the asset cache faster (#35003)

Winexists contacts the client and blocks, slowing down asset cache sends needlessly.

We now send multiple assets between verified sends. speeding up how quick preloading happen and reducing the number of junk files created in the clients cache.
TehZombehz/-tg-station,nicbn/tgstation,xxalpha/-tg-station,NicholasM10/-tg-station,GuyonBroadway/HippieStation,WJohn/-tg-station,tgstation/tgstation,ShizCalev/tgstation,Cyberboss/tgstation,CosmicScientist/-tg-station,Memendia/HippieStation,TheRealGLH/-tg-station,F-OS/tgstation,ChangelingRain/-tg-station,Jordie0608/tgstation,Y0SH1M4S73R/-tg-station,infinitystation/-tg-station,infinitystation/-tg-station,Jordie0608/tgstation,PKPenguin321/-tg-station,octareenroon91/-tg-station,Mark9013100/tgstation-m9,Incoming5643/-tg-station,GunHog/-tg-station,kevinz000/-tg-station,tgstation/tgstation,Razharas/-tg-station,xxalpha/-tg-station,kingofkosmos/-tg-station,QualityVan/tgstation,Y0SH1M4S73R/-tg-station,nicbn/tgstation,Mark9013100/tgstation-m9,QualityVan/tgstation,Arianya/tgstation,JStheguy/tgstation,WJohn/-tg-station,lordpidey/-tg-station,CPTANT/-tg-station,MicroWorldwide/SS13-TG-station,lordpidey/-tg-station,Tacolizard/tgstation,paprka/-tg-station,loqoman/tgstation,ToGWtF/yogstation,Incoming5643/-tg-station,MrStonedOne/tgstation,Jordie0608/tgstation,Bawhoppen/-tg-station,TehZombehz/-tg-station,Jordie0608/tgstation,MicroWorldwide/SS13-TG-station,feemjmeem/-tg-station,MrStonedOne/tgstation,McBawbaggings/HippieStation,Poojawa/tgstation-fork,JJRcop/tgstation,TheVekter/-tg-station,Niknakflak/-tg-station,tgstation/tgstation,anconfuzedrock/tgstation,riftstation/riftstation,Xhuis/-tg-station,Profakos/tgstation,Jordie0608/tgstation,Bawhoppen/-tg-station,loqoman/tgstation,GuyonBroadway/HippieStation,Aranclanos/-tg-station,lordpidey/-tg-station,McBawbaggings/HippieStation,F-OS/tgstation,tgstation/-tg-station,xxalpha/-tg-station,ShizCalev/tgstation,Arianya/tgstation,kevinz000/-tg-station,Xhuis/tgfork,McBawbaggings/HippieStation,anconfuzedrock/tgstation,CosmicScientist/-tg-station,CPTANT/-tg-station,JJRcop/-tg-station,Aranclanos/-tg-station,kevinz000/-tg-station,Robustin/tgstation,AnturK/-tg-station,PKPenguin321/-tg-station,optimumtact/-tg-station,nicbn/tgstation,Fox-McCloud/-tg-station,McBawbaggings/HippieStation,MrStonedOne/tgstation,Buggy123/-tg-station,CPTANT/-tg-station,Buggy123/-tg-station,PKPenguin321/-tg-station,Razharas/-tg-station,Arianya/tgstation,xxalpha/-tg-station,Incoming5643/-tg-station,Buggy123/-tg-station,anconfuzedrock/tgstation,Mark9013100/tgstation-m9,paprka/-tg-station,loqoman/tgstation,ToGWtF/yogstation,Robustin/tgstation,optimumtact/-tg-station,Xhuis/-tg-station,nicbn/tgstation,securitycopper/-tg-station,xxalpha/-tg-station,Aranclanos/-tg-station,AnturK/-tg-station,tgstation/-tg-station,ShizCalev/tgstation,Incoming5643/-tg-station,paprka/-tg-station,Bawhoppen/-tg-station,Jordie0608/tgstation,securitycopper/-tg-station,octareenroon91/-tg-station,Aranclanos/-tg-station,Y0SH1M4S73R/-tg-station,lordpidey/-tg-station,Fox-McCloud/-tg-station,paprka/-tg-station,WJohn/-tg-station,Shadowlight213/-tg-station,coiax/-tg-station,Aranclanos/-tg-station,infinitystation/-tg-station,ChangelingRain/-tg-station,loqoman/tgstation,Mark9013100/tgstation-m9,ShizCalev/tgstation,Profakos/tgstation,AnturK/-tg-station,feemjmeem/-tg-station,Anonus/-tg-station,4dplanner/tgstation,Y0SH1M4S73R/-tg-station,loqoman/tgstation,HippieStation/HippieStation,Xhuis/tgfork,Cruix/-tg-station,4dplanner/tgstation,Poojawa/tgstation-fork,Buggy123/-tg-station,Memendia/HippieStation,ChangelingRain/-tg-station,ShizCalev/tgstation,PKPenguin321/-tg-station,JStheguy/tgstation,GuyonBroadway/HippieStation,riftstation/riftstation,tgstation/tgstation,Shadowlight213/-tg-station,ShizCalev/tgstation,F-OS/tgstation,CosmicScientist/-tg-station,SamuelRowe/-tg-station,CPTANT/-tg-station,PKPenguin321/-tg-station,HippieStation/HippieStation,CosmicScientist/-tg-station,loqoman/tgstation,loqoman/tgstation,anconfuzedrock/tgstation,Jordie0608/-tg-station,Fox-McCloud/-tg-station,Cyberboss/tgstation,erwgd/-tg-station,Jordie0608/-tg-station,TheVekter/-tg-station,optimumtact/-tg-station,JStheguy/tgstation,Niknakflak/-tg-station,Cruix/-tg-station,Razharas/-tg-station,Niknakflak/-tg-station,QualityVan/tgstation,Cruix/-tg-station,securitycopper/-tg-station,kingofkosmos/-tg-station,tgstation/tgstation,ChangelingRain/-tg-station,XDTM/tgstation,octareenroon91/-tg-station,Buggy123/-tg-station,Xhuis/tgfork,octareenroon91/-tg-station,McBawbaggings/HippieStation,JJRcop/tgstation,Poojawa/tgstation-fork,Profakos/tgstation,riftstation/riftstation,feemjmeem/-tg-station,JStheguy/tgstation,Xhuis/tgfork,TalkingCactus/tgstation,XDTM/tgstation,Niknakflak/-tg-station,McBawbaggings/HippieStation,Profakos/tgstation,infinitystation/-tg-station,QualityVan/tgstation,Jordie0608/-tg-station,Xhuis/tgfork,tgstation/tgstation,kingofkosmos/-tg-station,ChangelingRain/-tg-station,ohnopigeons/tgstation,neersighted/tgstation,paprka/-tg-station,SamuelRowe/-tg-station,coiax/-tg-station,Robustin/tgstation,riftstation/riftstation,Arianya/tgstation,JJRcop/-tg-station,octareenroon91/-tg-station,F-OS/tgstation,AnturK/-tg-station,Xhuis/tgfork,TehZombehz/-tg-station,Thunder12345/-tg-station,Thunder12345/-tg-station,CPTANT/-tg-station,Niknakflak/-tg-station,MrStonedOne/tgstation,JJRcop/tgstation,Poojawa/tgstation-fork,feemjmeem/-tg-station,kevinz000/-tg-station,Razharas/-tg-station,nicbn/tgstation,GunHog/-tg-station,riftstation/riftstation,ohnopigeons/tgstation,Anonus/-tg-station,AnturK/-tg-station,GunHog/-tg-station,4dplanner/tgstation,CPTANT/-tg-station,kingofkosmos/-tg-station,TalkingCactus/tgstation,optimumtact/-tg-station,Thunder12345/-tg-station,coiax/-tg-station,Aranclanos/-tg-station,Profakos/tgstation,Cruix/-tg-station,Cyberboss/tgstation,Incoming5643/-tg-station,WJohn/-tg-station,xxalpha/-tg-station,kevinz000/-tg-station,Incoming5643/-tg-station,Aranclanos/-tg-station,JStheguy/tgstation,Bawhoppen/-tg-station,Jordie0608/tgstation,erwgd/-tg-station,Y0SH1M4S73R/-tg-station,MrStonedOne/tgstation,Aranclanos/-tg-station,feemjmeem/-tg-station,optimumtact/-tg-station,Shadowlight213/-tg-station,MicroWorldwide/SS13-TG-station,optimumtact/-tg-station,erwgd/-tg-station,Jordie0608/-tg-station,securitycopper/-tg-station,CPTANT/-tg-station,AnturK/-tg-station,neersighted/tgstation,neersighted/tgstation,lordpidey/-tg-station,Bawhoppen/-tg-station,TalkingCactus/tgstation,kevinz000/-tg-station,GuyonBroadway/HippieStation,infinitystation/-tg-station,Tacolizard/tgstation,TehZombehz/-tg-station,ChangelingRain/-tg-station,nicbn/tgstation,infinitystation/-tg-station,Arianya/tgstation,GuyonBroadway/HippieStation,GuyonBroadway/HippieStation,TheVekter/-tg-station,QualityVan/tgstation,NicholasM10/-tg-station,AnturK/-tg-station,QualityVan/tgstation,Profakos/tgstation,Shadowlight213/-tg-station,TheVekter/-tg-station,kingofkosmos/-tg-station,securitycopper/-tg-station,JJRcop/-tg-station,Bawhoppen/-tg-station,WJohn/-tg-station,xxalpha/-tg-station,Memendia/HippieStation,HippieStation/HippieStation,lordpidey/-tg-station,Y0SH1M4S73R/-tg-station,NicholasM10/-tg-station,Jordie0608/tgstation,Razharas/-tg-station,ToGWtF/yogstation,TheVekter/-tg-station,Mark9013100/tgstation-m9,tgstation/tgstation,PKPenguin321/-tg-station,Cruix/-tg-station,TehZombehz/-tg-station,Mark9013100/tgstation-m9,ChangelingRain/-tg-station,feemjmeem/-tg-station,Cyberboss/tgstation,kevinz000/-tg-station,JStheguy/tgstation,Razharas/-tg-station,feemjmeem/-tg-station,Shadowlight213/-tg-station,coiax/-tg-station,TheVekter/-tg-station,coiax/-tg-station,Xhuis/-tg-station,Poojawa/tgstation-fork,Cyberboss/tgstation,PKPenguin321/-tg-station,TheVekter/-tg-station,neersighted/tgstation,Niknakflak/-tg-station,Robustin/tgstation,Robustin/tgstation,F-OS/tgstation,SamuelRowe/-tg-station,GuyonBroadway/HippieStation,QualityVan/tgstation,Poojawa/tgstation-fork,4dplanner/tgstation,Buggy123/-tg-station,4dplanner/tgstation,ohnopigeons/tgstation,Tacolizard/tgstation,optimumtact/-tg-station,Profakos/tgstation,neersighted/tgstation,WJohn/-tg-station,GunHog/-tg-station,GunHog/-tg-station,tgstation/-tg-station,SamuelRowe/-tg-station,Xhuis/tgfork,Shadowlight213/-tg-station,MrStonedOne/tgstation,feemjmeem/-tg-station,CosmicScientist/-tg-station,ChangelingRain/-tg-station,coiax/-tg-station,GunHog/-tg-station,Cruix/-tg-station,Xhuis/tgfork,Anonus/-tg-station,CosmicScientist/-tg-station,Cyberboss/tgstation,Shadowlight213/-tg-station,TehZombehz/-tg-station,MrStonedOne/tgstation,Y0SH1M4S73R/-tg-station,Arianya/tgstation,Tacolizard/tgstation,Fox-McCloud/-tg-station,xxalpha/-tg-station,Cruix/-tg-station,MrStonedOne/tgstation,neersighted/tgstation,securitycopper/-tg-station,XDTM/tgstation,JJRcop/tgstation,lordpidey/-tg-station,riftstation/riftstation,Incoming5643/-tg-station,Xhuis/-tg-station,XDTM/tgstation,ShizCalev/tgstation,Cyberboss/tgstation,F-OS/tgstation,tgstation/-tg-station,CPTANT/-tg-station,Buggy123/-tg-station,HippieStation/HippieStation,Thunder12345/-tg-station,ToGWtF/yogstation,securitycopper/-tg-station,Razharas/-tg-station,MicroWorldwide/SS13-TG-station,coiax/-tg-station,kingofkosmos/-tg-station,infinitystation/-tg-station,Tacolizard/tgstation,Fox-McCloud/-tg-station,kingofkosmos/-tg-station,infinitystation/-tg-station,Thunder12345/-tg-station,JStheguy/tgstation,paprka/-tg-station,4dplanner/tgstation,Mark9013100/tgstation-m9,ShizCalev/tgstation,NicholasM10/-tg-station,JJRcop/tgstation,loqoman/tgstation,Memendia/HippieStation,Robustin/tgstation,paprka/-tg-station,Bawhoppen/-tg-station,XDTM/tgstation,TheRealGLH/-tg-station,kevinz000/-tg-station,PKPenguin321/-tg-station,Shadowlight213/-tg-station,TheRealGLH/-tg-station,HippieStation/HippieStation,Y0SH1M4S73R/-tg-station,MicroWorldwide/SS13-TG-station,CosmicScientist/-tg-station,WJohn/-tg-station,Tacolizard/tgstation,JJRcop/-tg-station,HippieStation/HippieStation,Arianya/tgstation,Robustin/tgstation,NicholasM10/-tg-station,McBawbaggings/HippieStation,TheRealGLH/-tg-station,MicroWorldwide/SS13-TG-station,NicholasM10/-tg-station,JJRcop/tgstation,Anonus/-tg-station,F-OS/tgstation,Incoming5643/-tg-station,XDTM/tgstation,Robustin/tgstation,Tacolizard/tgstation,MicroWorldwide/SS13-TG-station,XDTM/tgstation,tgstation/tgstation,Memendia/HippieStation,F-OS/tgstation,neersighted/tgstation,riftstation/riftstation,anconfuzedrock/tgstation,lordpidey/-tg-station,Tacolizard/tgstation,Thunder12345/-tg-station,nicbn/tgstation,NicholasM10/-tg-station,Bawhoppen/-tg-station,Buggy123/-tg-station,Memendia/HippieStation,NicholasM10/-tg-station,ohnopigeons/tgstation,paprka/-tg-station,GuyonBroadway/HippieStation,Thunder12345/-tg-station,neersighted/tgstation,Razharas/-tg-station,MicroWorldwide/SS13-TG-station,Fox-McCloud/-tg-station,Niknakflak/-tg-station,McBawbaggings/HippieStation,CosmicScientist/-tg-station,Memendia/HippieStation,Cruix/-tg-station,securitycopper/-tg-station,TehZombehz/-tg-station,Memendia/HippieStation,anconfuzedrock/tgstation,TehZombehz/-tg-station,Poojawa/tgstation-fork,JJRcop/tgstation,Fox-McCloud/-tg-station,TalkingCactus/tgstation,HippieStation/HippieStation,4dplanner/tgstation,anconfuzedrock/tgstation,GunHog/-tg-station,4dplanner/tgstation,riftstation/riftstation