Add setting to disable confirmation on new player registration (#8102)

builtin/settingtypes.txt

@@ -912,6 +912,10 @@ serverlist_file (Serverlist file) string favoriteservers.txt
 #    0 to disable queueing and -1 to make the queue size unlimited.
 max_out_chat_queue_size (Maximum size of the out chat queue) int 20
 
+#    Enable register confirmation when connecting to server.
+#    If disabled, new account will be registered automatically.
+enable_register_confirmation (Enable register confirmation) bool true
+
 [*Advanced]
 
 #    Timeout for client to remove unused map data from memory.

src/defaultsettings.cpp

@@ -60,6 +60,7 @@ void set_default_settings(Settings *settings)
 	settings->setDefault("enable_client_modding", "false");
 	settings->setDefault("max_out_chat_queue_size", "20");
 	settings->setDefault("pause_on_lost_focus", "false");
+	settings->setDefault("enable_register_confirmation", "true");
 
 	// Keymap
 	settings->setDefault("remote_port", "30000");

src/network/clientpackethandler.cpp

@@ -98,7 +98,8 @@ void Client::handleCommand_Hello(NetworkPacket* pkt)
 	// Authenticate using that method, or abort if there wasn't any method found
 	if (chosen_auth_mechanism != AUTH_MECHANISM_NONE) {
 		if (chosen_auth_mechanism == AUTH_MECHANISM_FIRST_SRP
-				&& !m_simple_singleplayer_mode) {
+				&& !m_simple_singleplayer_mode
+				&& g_settings->getBool("enable_register_confirmation")) {
 			promptConfirmRegistration(chosen_auth_mechanism);
 		} else {
 			startAuth(chosen_auth_mechanism);