While regtesting with [bitcoin-spock](https://github.com/msgilligan/bitcoin-spock) I noticed at some point the transaction creation via `sendtoaddress -> CreateTransaction()` fails, because the created transaction is larger than `MAX_STANDARD_TX_SIZE`.

During the process a lot of raw transactions are created, which have smallish outputs and when then using `sendtoaddress`, it appears to attempt to create a transaction that spends too many of those dust-ish outputs.

The transaction to create does not have many outputs, but it looks like it's caused by the coin selection, which selects too many inputs. Testing was done with a 0.9 branch, but on the first glimpse I believe this issue is as well be present in 0.10. If this is a known issue, and if there is already a guard against this behavior, I'd be happy about a hint.

Sorry in advance, I do not have a test script to reproduce this issue in an isolated manner. A potential fix would probably require to adjust the coin selection, so that it selects a combination of coins, which, in addition to the size of the rest of the transaction, is still smaller than the limit.

return result;
}
CoinsResult AvailableCoinsListUnspent(const CWallet& wallet, const CCoinControl* coinControl, CoinFilterParams params)
{
    params.only_spendable = false;
    return AvailableCoins(wallet, coinControl,  std::nullopt, params);
}
CAmount GetAvailableBalance(const CWallet& wallet, const CCoinControl* coinControl)
{
    LOCK(wallet.cs_wallet);
    return AvailableCoins(wallet, coinControl).GetTotalAmount();
}
const CTxOut& FindNonChangeParentOutput(const CWallet& wallet, const CTransaction& tx, int output)
{
    AssertLockHeld(wallet.cs_wallet);
    const CTransaction* ptx = &tx;
    int n = output;
    while (OutputIsChange(wallet, ptx->vout[n]) && ptx->vin.size() > 0) {
        const COutPoint& prevout = ptx->vin[0].prevout;
        auto it = wallet.mapWallet.find(prevout.hash);
        if (it == wallet.mapWallet.end() || it->second.tx->vout.size() <= prevout.n ||
            !wallet.IsMine(it->second.tx->vout[prevout.n])) {
            break;
        }
        ptx = it->second.tx.get();
        n = prevout.n;
    }
    return ptx->vout[n];
}
const CTxOut& FindNonChangeParentOutput(const CWallet& wallet, const COutPoint& outpoint)