test changing cameCase for _ in protobuf servercard

pb/messages.proto

@@ -100,7 +100,7 @@ message Matriochka {
 message ServerCard {
     string	name = 1; // friendly server name
     string description=2; // description : owner type (company/private/university...), 
-    string publicKey = 3; // public key you must use to send encrypted messages to that server
+    string public_key = 3; // public key you must use to send encrypted messages to that server
     string url = 4; // meow server url
     string login = 5; // required login to access the server
     string password = 6; // password associated to the login