This diff requires each UTXO in a proof to have a minimum age expressesed as a number of confirmations. The default is 0 to avoid breaking all the tests but the value is set to 2016 (about 2 weeks) when `-avalanche=1` is set.
Co-authored-by: Fabien <fabcien@gmail.com>
Co-authored-by: Skuli Dulfari <sdulfari@protonmail.com>