Allow pool owner to run the pool without explicitly declare the address

[lubuzzo]

• Setting the address to false (pool_configs > coin.json), will generate a new address on startup and after every submission of block

[HashUnlimited]

This is useful for pool owners caring about privacy of themselves and their users. In fact, it's the way how blockchain should be commonly used.

this feature is optional and goes together with
zone117x/node-stratum-pool#172

tested with and without the option on -keypool=10 kp size
tested with internal payment processor and MPOS on P2PKH, P2SH and bech32