Escape player names

[JacobFischer]

Joueur.cpp/joueur/src/base_game.cpp

Line 68 in f4f40d6

to_send += ai_->get_name();

Currently player names are appended to the json "raw", no characters are escaped.

So if you have a " in your name, that will terminate the JSON structure being built, and the game server might reject you for invalid JSON. Or maybe even be open to attacks (however the game server does try to guard against malicious clients so hopefully not).

We need to escape any strings the AIs can generate for safety.

[JacobFischer]

Thanks to @sprdk4 for noticing this.