`-ac_blocktime=260` + `-ac_halving=420000` + `-ac_reward=2400000000` makes TESTCOIN with block time of 260 seconds and halving every 420000 blocks with initial reward of 24 TESTCOIN.
`-ac_blocktime=260` + `-ac_halving=420000` + `-ac_reward=2400000000` makes TESTCOIN with block time of 260 seconds and halving every 420000 blocks with initial reward of 24 TESTCOINs.