Synchronized source file headers (#3212)

* Alphabetically sorted includes.
* Updated copyright and license text to match across all files.
* Removed pragma once define in header files in lieu of ifdef guards.

src/common/winapi.cpp

@@ -1,10 +1,8 @@
-// Copyright (c) Athena Dev Teams - Licensed under GNU GPL
+// Copyright (c) rAthena Dev Teams - Licensed under GNU GPL
 // For more information, see LICENCE in the main folder
 
 #include "winapi.hpp"
 
-#include "cbasetypes.hpp"
-
 // Taken from https://support.microsoft.com/de-de/help/118626/how-to-determine-whether-a-thread-is-running-in-user-context-of-local
 bool IsCurrentUserLocalAdministrator(void){
 #ifdef WIN32