message: [tests] Comment for why logging config is set as command-line args.
diff: @@ -80,6 +80,9 @@ class TestNode():
  # For those callers that need more flexibility, they can just set the args property directly.
  # Note that common args are set in the config file (see initialize_datadir)
  self.extra_args = extra_args
  + # Configuration for logging is set as command-line args rather than in the bitcoin.conf file.
  + # This means that starting a bitcoind using the temp dir to debug a failed test won't
  + # spam debug.log.
  self.args = [
  self.binary,
  "-datadir=" + self.datadir,
  