LSP: Add support for custom host setting

You can now configure host in the `language_server` settings in the editor
settings.

(cherry picked from commit be6da39b8af5f95d3086deeceb5d3c38f1ab1717)

modules/gdscript/language_server/gdscript_language_server.cpp

@@ -38,9 +38,11 @@
 GDScriptLanguageServer::GDScriptLanguageServer() {
 	thread_running = false;
 	started = false;
-
 	use_thread = false;
+	host = "127.0.0.1";
 	port = 6008;
+
+	_EDITOR_DEF("network/language_server/remote_host", host);
 	_EDITOR_DEF("network/language_server/remote_port", port);
 	_EDITOR_DEF("network/language_server/enable_smart_resolve", true);
 	_EDITOR_DEF("network/language_server/show_native_symbols_in_editor", false);
@@ -61,9 +63,10 @@ void GDScriptLanguageServer::_notification(int p_what) {
 			}
 		} break;
 		case EditorSettings::NOTIFICATION_EDITOR_SETTINGS_CHANGED: {
+			String host = String(_EDITOR_GET("network/language_server/remote_host"));
 			int port = (int)_EDITOR_GET("network/language_server/remote_port");
 			bool use_thread = (bool)_EDITOR_GET("network/language_server/use_thread");
-			if (port != this->port || use_thread != this->use_thread) {
+			if (host != this->host || port != this->port || use_thread != this->use_thread) {
 				this->stop();
 				this->start();
 			}
@@ -81,9 +84,10 @@ void GDScriptLanguageServer::thread_main(void *p_userdata) {
 }
 
 void GDScriptLanguageServer::start() {
+	host = String(_EDITOR_GET("network/language_server/remote_host"));
 	port = (int)_EDITOR_GET("network/language_server/remote_port");
 	use_thread = (bool)_EDITOR_GET("network/language_server/use_thread");
-	if (protocol.start(port, IP_Address("127.0.0.1")) == OK) {
+	if (protocol.start(port, IP_Address(host)) == OK) {
 		EditorNode::get_log()->add_message("--- GDScript language server started ---", EditorLog::MSG_TYPE_EDITOR);
 		if (use_thread) {
 			thread_running = true;

modules/gdscript/language_server/gdscript_language_server.h

@@ -44,6 +44,7 @@ class GDScriptLanguageServer : public EditorPlugin {
 	bool thread_running;
 	bool started;
 	bool use_thread;
+	String host;
 	int port;
 	static void thread_main(void *p_userdata);