mDNS support

Is it possible to introduce mDNS support? I think it made access to device webinterface easy like at this project: https://github.com/loboris/MicroPython_ESP32_psRAM_LoBo/wiki/mdns
There possible two states:
- unconfigured ap mode - uPyEasy-{device.id}.local
- configured sta mode sam as previous by default, but configurable from webinterface.

And thanks for your great work.