espalarm Code

Reduce code size by joining the two functionalities

Extend OTA with browser upload function (MIME structure)

Simplify handling of connected status in Network module

OTA module now consistently updates in 17..18 seconds
Created a small App class to reduce global variable count

Rename Keypad.h to App.h

Start two webservers (http and https)

Remove unused definitions

Support more than one config file, for e.g. a whitelist.json global to all nodes.
This requires changes to Config::ParseConfig so it doesn't always reinitialize.
The security configuration allows distinction between OTA and other nodes (read : not every IP or MAC address can flash our nodes).

Work with newest v3.3.5 esp-idf

An additional configuration item to allow nonstandard (other than 443) https ports.
WebServer : disabling http as a fallback is a bad idea, it's a requirement to kickstart ACME.