Make HTTP req accessors call themselves with their default default value
Make HTTP req accessors call themselves with their default default value

Use lists:keyfind/3 in qs_val/3, binding/3 and header/3 and make qs_val/2,
binding/2 and header/2 call those.

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