ecash (XEC) reject blocks with bad-cb-minerfund error
### Discussed in https://github.com/oliverw/miningcore/discussions/1541

<div type='discussions-op-text'>

<sup>Originally posted by **btclinux** December  8, 2022</sup>
Hi! I see in coins.json for ecash https://github.com/oliverw/miningcore/blob/master/src/Miningcore/coins.json#L908
```"hasMinerFund": true```

All blocks rejected with:
```
ERROR: ConnectTip: ConnectBlock 0000000000000000097c03ca368bc4efbc271a1ba308877befdf69d62cdb3a5c failed, bad-cb-minerfund
```
Should I add something special in pool config?

ecash node config:
```
rpcuser=rpcuser
rpcpassword=rpcpassword
prune=550
deprecatedrpc=accounts
usecashaddr=0
zmqpubhashblock=tcp://127.0.0.1:15101
```</div>