Added or adjusted copyright and license statements in single files

libburn/sg-freebsd.c

@@ -1,5 +1,11 @@
 /* -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 8; -*- */
 
+/* 
+   Copyright (c) 2006 - 2010 Thomas Schmitt <scdbackup@gmx.net>
+   Provided under GPL version 2 or later.
+*/
+
+
 #include <errno.h>
 #include <unistd.h>
 #include <stdio.h>