vm -> spuriousDragon: added EIP-211 Byzantium HF checks for RETURNDATASIZE and RETURNDATACOPY
vm -> spuriousDragon: added EIP-211 Byzantium HF checks for RETURNDATASIZE and RETURNDATACOPY

ethereum/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm