allow multiple handlers

[vladak]

The code says only one handler is supported:

Adafruit_CircuitPython_Logging/adafruit_logging.py

Lines 298 to 306 in a67856d

	def addHandler(self, hdlr: Handler) -> None:
	"""Sets the handler of this logger to the specified handler.
	*NOTE* This is slightly different from the CPython equivalent
	which adds the handler rather than replacing it.
	:param Handler hdlr: The handler to add
	"""
	self._handler = hdlr

however does not say why.

Is this some hidden limitation or conscious implementation choice ?

I am asking because I'd like to implement a MQTTHandler (log by publishing MQTT messages) and use it in addition to the StreamHandler for my project (vladak/shield#3).

[tekktrik]

I think this is an implementation choice from when the library was lighter, but if you'd like to submit a PR to use multiple handlers I think it'd be a welcome addition. I don't think it would add too much overhead to add that support.