Save Lua globals after mod loading

These are used for the async env currently and will be needed elsewhere soon.

src/server.h

@@ -383,8 +383,8 @@ public:
 	// Lua files registered for init of async env, pair of modname + path
 	std::vector<std::pair<std::string, std::string>> m_async_init_files;
 
-	// Data transferred into async envs at init time
-	std::unique_ptr<PackedValue> m_async_globals_data;
+	// Data transferred into other Lua envs at init time
+	std::unique_ptr<PackedValue> m_lua_globals_data;
 
 	// Bind address
 	Address m_bind_addr;