Bugfix: Send errors as proper JSON-RPC responses
Bugfix: Send errors as proper JSON-RPC responses

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