formspec_escape stability improvement

* formspec_escape causes server crash, when text argument is a number.
  the `tostring(text)` prevents this
* backported https://github.com/MultiCraft/MultiCraft/pull/87

builtin/common/misc_helpers.lua

@@ -254,6 +254,7 @@ end
 
 
 function core.formspec_escape(text)
+	text = tostring(text)
 	if text ~= nil then
 		text = text:gsub("\\", "\\\\")
 		text = text:gsub("%]", "\\]")

builtin/settingtypes.txt

@@ -994,7 +994,7 @@ 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
+enable_register_confirmation (Enable register confirmation) bool false
 
 [*Advanced]
 

src/defaultsettings.cpp

@@ -73,7 +73,7 @@ void set_default_settings()
 	settings->setDefault("enable_client_modding", "true");
 	settings->setDefault("max_out_chat_queue_size", "20");
 	settings->setDefault("pause_on_lost_focus", "true");
-	settings->setDefault("enable_register_confirmation", "true");
+	settings->setDefault("enable_register_confirmation", "false");
 
 	// Keymap
 	settings->setDefault("remote_port", "30000");