Declared missing shutdown logic as unproblematic.

The only thing a shutdown logic would do is to clean up the very resources the OS cleans up anyway when interrupting the process. So I just don't see the point in the complexity of a signal handler (and SetConsoleCtrlHandler on Windows).

server/main.cpp

@@ -263,7 +263,6 @@ int main(int argc, char *argv[])
 		return EXIT_FAILURE;
 	}
 
-// TODO: Add server shutdown
 	while (1)
 	{
 		unsigned char auReadBuf[256];