Support EU Puzzle Endpoint

[amenk]

Friendly Captcha provides in some plans a EU endpoint for better GDPR compatibility.

I think the current version of this module does not support the EU Puzzle endpoint.
While it is possible to use the EU API by defining verify_server

We would need to add

in the HTML

db_friendlycaptcha/Resources/Private/Frontend/Partials/FriendlyCaptcha.html

Line 16 in 8aa14a5

{f:if(condition: '{configuration.lang}', then: 'data-lang="{configuration.lang}"')}></div>

by introducing a second configuration variable.

[amenk]

data-puzzle-endpoint="https://eu-api.friendlycaptcha.eu/api/v1/puzzle"

would need to be added here (configurable)