Allow custom datadir for loggers.

[mojoX911]

coinswap/src/utill.rs

Lines 149 to 154 in b309205

	pub fn setup_taker_logger(filter: LevelFilter, is_stdout: bool) {
	Once::new().call_once(|| {
	// TODO: Get the custom datadir instead of the default.
	let log_dir = get_taker_dir().join("debug.log");
	let file_appender = FileAppender::builder().build(log_dir).unwrap();

Currently all our loggers are always putting the deblug.log file in the default data directory. This means even if the user is passing custom datadir, the log file will be in the default directory.

Make all the setup_logger function to take in a Option<Path> as datadir, and if None then defaults to the default datadir.

[0xEgao]

Hey I have made a pr #405 for this ,please review it ,and let me know for any feedbacks.