[pic18net] original_web_change_appconfig_procedures

(Based on Microchip TCPIP Stack 5.25v)

http2.C -> case SM_HTTP_PROCESS_POST: -> c = HTTPExecutePost(); -> HTTPExecutePost() -> if(!memcmppgm2ram(filename, "protect/config.htm", 18)) return HTTPPostConfig(); -> HTTPPostConfig() -> //Read all browser POST data from "config.htm" web-page