mDNS and ArduinoOTA

[merlokk]

very bad time to seek

https://github.com/esp8266/Arduino/tree/master/libraries/ESP8266mDNS

[merlokk]

https://techtutorialsx.com/2016/11/20/esp8266-webserver-resolving-an-address-with-mdns/

[merlokk]

browser here:
https://hobbyistsoftware.com/bonjourBrowser

[merlokk]

https://chrome.google.com/webstore/category/extensions
http://www.tildesoft.com/

[merlokk]

https://github.com/esp8266/Arduino/blob/0c66c8a88fa192f32c81e6f5300002f10ebdc0fd/libraries/ESP8266mDNS/ESP8266mDNS.cpp#L187
https://github.com/esp8266/Arduino/blob/0c66c8a88fa192f32c81e6f5300002f10ebdc0fd/libraries/ESP8266mDNS/ESP8266mDNS.h#L60

[merlokk]

maybe fixes here
esp8266/Arduino#3215

ARP + UDP multicast fix