Arbitrary data in config file

[rllola]

When creating a coinbase transaction, it is possible to add a personalize message. For now it is hardcoded. The message to encode should be specified in the config file.

See

dogecoin-miner-rust/src/main.rs

Line 67 in 9455eba

let script_data = hex::decode("4c6f6c6120697320746865206265737421").unwrap();