Add Zlib::GzipFile::Error to the list of errors that may be raised by net/http
Add Zlib::GzipFile::Error to the list of errors that may be raised by net/http

Closes jnunemaker/twitter#276

O-I/faraday,hstrowd/faraday,zhaoxl/faraday,customink/faraday,daviswahl/faraday,petems/faraday,AvaelKross/faraday,santiagodoldan/faraday,apepper/faraday,luvtechno/faraday,jrafanie/faraday,zanker/faraday,hstrowd/faraday,grosser/faraday,spyofchina/faraday,lostisland/faraday,ru-faraon/Faraday-is-an-HTTP-client,mauricionr/faraday,lostisland/faraday,stayhero/faraday,ru-faraon/Faraday-is-an-HTTP-client,hrysd/faraday,iamjarvo/faraday,davoclavo/faraday,engineyard/faraday,customink/faraday,nevans/faraday,prcongithub/faraday,pvdb/faraday,jrafanie/faraday,spyofchina/faraday,davoclavo/faraday,zanker/faraday,flower-pot/faraday,jhass/faraday,flower-pot/faraday,engineyard/faraday,hrysd/faraday,pvdb/faraday,luvtechno/faraday,jhass/faraday,coinbase/faraday,santiagodoldan/faraday,O-I/faraday,grosser/faraday,coinbase/faraday,davidcornu/faraday,davidcornu/faraday,ngpestelos/faraday,ekampp/faraday,daviswahl/faraday,AvaelKross/faraday,zhaoxl/faraday,iamjarvo/faraday,prcongithub/faraday,mehulkar/faraday,ngpestelos/faraday,mehulkar/faraday,mauricionr/faraday,petems/faraday,nevans/faraday,apepper/faraday,ekampp/faraday,stayhero/faraday