slight refactor codes of p2pnet
slight refactor codes of p2pnet

ethers/pyethereum,vaporry/pyethereum,pipermerriam/pyethereum,ethereum/pyethereum,karlfloersch/pyethereum,shahankhatch/pyethereum,ddworken/pyethereum,ebuchman/daoist_protocol,ckeenan/pyethereum,ethereum/pyethereum,jnnk/pyethereum,inzem77/pyethereum,karlfloersch/pyethereum,ethermarket/pyethereum,harlantwood/pyethereum,holiman/pyethereum,ebuchman/daoist_protocol,shahankhatch/pyethereum,pipermerriam/pyethereum