Adaptation to the esp8266

[hiperiondev]

Thanks for your great software. I made an adaptation to the esp8266 with some small modifications. It is a project of a couple of days and needs several optimizations but it works correctly .

• The DNS / captive portal is optional: it is not always necessary and generates too many reconnections to the http server
• HTTPS is added: I understand that it is pushing too much to esp8266 but it works, taking into account the minimization of memory use.

I leave you the link in case you are interested in seeing the differences. https://github.com/hiperiondev/esp8266-wifi-manager