add unit test for cowboy_protocol:parse_host/1
add unit test for cowboy_protocol:parse_host/1

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