Added meta viewport element for better mobile device viewing.
For example CaptivePortalAdvanced, increased size of ssid and password array
to hold maximums 32 and 64 charcter strings. Added missing HTML elments
to main splash and wifi config. They should now pass an HTML checker.
Also added meta viewport element for better mobile device viewing.
Android refuses to show page with missing Content-Length header.
Prepare page data to String and send it with server.send
Moved respose strings to PROGMEM
This example serves a "hello world" on a WLAN and a SoftAP at the same
time.
The SoftAP allow you to configure WLAN parameters at run time. They are
not setup in the sketch but saved on EEPROM.
This is a captive portal because through the softAP it will redirect any
http request to http://192.168.4.1/, served by the ESP8266 itself
