@jaguilar, since you're doing FreeRTOS and MDNS, can you give this PR and the new SimpleMDNS library a test?

There were multiple LWIP tweaks needed to actually allow the MDNS responder to work, like increasing the internal LWIP timers. W/O it you'd panic as soon as you actually did some network I/O.

Basic testing replacing LEAmDMS in OTA and HTTPUpdateServer seem to "just work."

Yes, I will test it.

For anyone testing something like this from platformio in the future, the magic is:

[env:pico]
platform = https://github.com/maxgerhardt/platform-raspberrypi.git
platform_packages = 
		framework-arduinopico @ https://github.com/earlephilhower/arduino-pico.git#1a05d9261df14c5ecabf6c9dc8af28b0ca6def9e

And I can confirm it works. I am able to resolve .local addresses after flashing with the rebuilt program. I did not test the MDNS responder because I do not know how it works and I have no code to use it at the moment.

One other really great thing about this feature -- even though my server has a static IP my client was having some inconsistency reconnecting to it when I was manually loading the IP address. Now that we're over to mdns, I have restarted the server several times and seen no client reconnect failures. So happy!

I just came across this new SimpleMDNS library and it seems to work well in combination with FreeRTOS. Thanks for adding this.

One thing that doesn't make it a full drop-in replacement for us it that begin() doesn't return a bool for the success/fail status, as LEAmDNS does, but that can be worked around.

@GUVWAF begin can only fail if it's already running or there are no netifs available. Want to do a PR to add the bool return to it and make it even better?

@earlephilhower Yes, will do that.