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.

{
            CAmount val = distribution(generator)*10000000;
            add_coin(available_coins, *wallet, val);
            balance += val;
        }
        
        CFeeRate rate(rand.randrange(300) + 100);
        
        CAmount target = rand.randrange(balance - 1000) + 1000;
        
        CoinSelectionParams cs_params{
            rand,
             34,
             148,
             CENT,
             CFeeRate(0),
             CFeeRate(0),
             CFeeRate(0),
             0,
             false,
        };
        cs_params.m_cost_of_change = 1;
        cs_params.min_viable_change = 1;
        CCoinControl cc;
        const auto result = SelectCoins(*wallet, available_coins, {}, target, cc, cs_params);
        BOOST_CHECK(result);
        BOOST_CHECK_GE(result->GetSelectedValue(), target);
    }
}
BOOST_AUTO_TEST_CASE(waste_test)