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/utils.cpp

@@ -1,14 +1,11 @@
-// 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 "cbasetypes.hpp"
-#include "showmsg.hpp"
-#include "socket.hpp"
 #include "utils.hpp"
 
+#include <math.h> // floor()
 #include <stdlib.h>
 #include <string.h>
-#include <math.h> // floor()
 
 #ifdef WIN32
 	#include "winapi.hpp"
@@ -21,6 +18,9 @@
 	#include <sys/stat.h>
 #endif
 
+#include "cbasetypes.hpp"
+#include "showmsg.hpp"
+#include "socket.hpp"
 
 /// Dumps given buffer into file pointed to by a handle.
 void WriteDump(FILE* fp, const void* buffer, size_t length)