If one calls `fundrawtransaction`, the change address will be retrieved from the keypool, though, this key/address will always be returned to the pool, leading to the problem that the next `getnewaddress()` call will restult in the same key/address.

Either we remove the auto-change-address (users would need to call `getrawchangeaddress` first [current best practice anyway]) or we add a call to keep/mark a specific key/address as change (after one have sent the funded raw transaction).

Reported by @NicolasDorier on IRC.
{
    if (GetBoolArg("-disablewallet", DEFAULT_DISABLE_WALLET)) {
        pwalletMain = NULL;
        LogPrintf("Wallet disabled!\n");
        return true;
    }
    std::string walletFile = GetArg("-wallet", DEFAULT_WALLET_DAT);
    CWallet * const pwallet = CreateWalletFromFile(walletFile);
    if (!pwallet) {
        return false;
    }
    pwalletMain = pwallet;
    return true;
}
std::atomic<bool> CWallet::fFlushThreadRunning(false);
void CWallet::postInitProcess(boost::thread_group& threadGroup)