Bugfix: restore Content-Type for non-NELH longpoll responses
Bugfix: restore Content-Type for non-NELH longpoll responses

thrasher-/eloipool,svasva/eloipool,thrasher-/eloipool,ahmedbodi/SHA-Eloipool-MMCFE-,uingei/eloipool,imsaguy/eloipool,uingei/eloi,jameshilliard/4tar-eloipool,pointgaming/point-gaming-btc,thrasher-/eloipool,cinnamoncoin/eloipool-1,wizkid057/eloipool