- fix response not being delivered to the browser after upload is done
(https://github.com/esp8266/Arduino/issues/2221)
- if Update.begin fails, don’t attempt to write data
- if update is not successful, send error message from Update to the
client
- move strings into PROGMEM
* make HTTP Update Server more secure
* added option for authentication
* added option to change the url for upload
* move to overloaded setup
* remove delay in both examples
* Get better result responses
* fix strings
interesting, the meta did not refresh if the successResponse is put in
"R"
This ESP8266HTTPUpdateServer can be instantiated and used
more cleanly, it's also able to take or create an ESP8266WebServer
to configure the events and /update handler.
It's been made more robust by handling upload abort, which
depends on fix provided for issue #833
