Improve pastebin example
Improve pastebin example

Reject more malicious paths.

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