[bisq-network/bisq] Bisq does not add "dust" outputs to miner fee (#4039)

[James Cox]

1) Bob chooses send from a single UTXO containing 0.1 BTC
2) he sends 0.099995 BTC to Alice, with "amount includes mining fee" set.
3) A transaction is generated and written to the log file:
   0.09993624 to Alice
   0.00005876 mining fee
   0.00000500 to Bob's change address
4) no error is given about dust amounts.
5) the transaction is posted on Bob's wallet and his available balance goes to zero.
6) the transaction does not reach the blockchain, shows as pending on Bob's wallet.
7) no error shown in the log
even after reboot it stays "lost".
deleting SPV files clears out the erroneous tx.

only done this on regtest so far.
problem stems from 'ensureMinRequiredFee' being set to false throughout the codebase; BitcoinJ library only does the dust check when that flag is set to true.

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