Use lists:keyreplace/4 instead of lists:keydelete/3 + cons
Use lists:keyreplace/4 instead of lists:keydelete/3 + cons

LineMetrics/cowboy,noname007/cowboy,bsmr-erlang/cowboy,piboye/cowboy,essen/cowboy,binarin/cowboy,hairyhum/cowboy,bobos/ecweb,linearregression/cowboyku,cad627/cowboy,heroku/cowboy,layerhq/cowboy,ferd/cowboyku,unisontech/cowboy,yangchengjian/cowboy,yangchengjian/cowboy,276361270/cowboy,venkateshreddy/cowboy,omusico/cowboy,manastech/cowboy,K2InformaticsGmbH/cowboy,LineMetrics/cowboy,acrispin/cowboy,imdeps/cowboy,heroku/cowboy,nviennot/cowboy,heroku/cowboyku,rbalint/pkg-erlang-cowboy,LineMetrics/cowboy,manastech/cowboy,cad627/cowboy,pap/cowboy,callsign-core/cowboy_hybi00,paulperegud/cowboy,MSch/cowboy,lpgauth/cowboy,rabbitmq/cowboy,grahamrhay/cowboy,kivra/cowboy,piboye/cowboy,binarin/cowboy,layerhq/cowboy,dangjun625/cowboy,odo/cowboy,turtleDeng/cowboy,sile/cowboy,ninenines/cowboy,lpgauth/cowboy,Reimerei/cowboy,essen/cowboy,CrankWheel/cowboy,callsign-core/cowboy_hybi00,unisontech/cowboy