Allow specifying the exact desired output filename

[cirosantilli]

LevelDB Dumper version

e750a27ff58443ecc410b5c16abbdc539d617387

Reasoning and description behind this feature request

When I do something like:

LevelDBDumper -d ~/snap/bitcoin-core/common/.bitcoin/blocks/index -o . -f btc.csv

it produces a very long output filename:

2024213222836__home_ciro_snap_bitcoin-core_common_.bitcoin_blocks_index_LevelDBDumper.json

Is there a way to output to a file called exactly btc.csv instead?