espalarm Code

Save a couple of KB on image size for error messages

Remove accidental addition

Fix authentication, make it suitable for this use case

Remove debug
Mention the origin of the QR code generator

Remove Arduino String from Oled as well.
Add QR code on screen 3 to assist in enlisting cell phones to connect.

Decrease verbosity

Don't just use ACME if NATted or not (inconclusive criteria).
Configuration can now also be read from a file, not hardcoded.
FTP server enabled by default if neither a config file nor hardcoding is present.
So you can upload a file initially ;-)

Remove warning.
Lower verbosity.

FTP server works on both IPv4 and IPv6 now.

Now works over IPv6 but not over IPv4