libxl: Use standard format for source file copyright notice

Change source file copyright notice to prevailing libvirt style.

src/libxl/libxl_conf.c

-/*---------------------------------------------------------------------------*/
-/* Copyright (C) 2012 Red Hat, Inc.
- * Copyright (c) 2011 SUSE LINUX Products GmbH, Nuernberg, Germany.
+/*
+ * libxl_conf.c: libxl configuration management
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ * Copyright (c) 2011-2013 SUSE LINUX Products GmbH, Nuernberg, Germany.
  * Copyright (C) 2011 Univention GmbH.
  *
  * This library is free software; you can redistribute it and/or
@@ -21,7 +23,6 @@
  *     Jim Fehlig <jfehlig@novell.com>
  *     Markus Groß <gross@univention.de>
  */
-/*---------------------------------------------------------------------------*/
 
 #include <config.h>
 

src/libxl/libxl_conf.h

-/*---------------------------------------------------------------------------*/
-/*  Copyright (C) 2011-2013 SUSE LINUX Products GmbH, Nuernberg, Germany.
- *  Copyright (C) 2011 Univention GmbH.
+/*
+ * libxl_conf.h: libxl configuration management
+ *
+ * Copyright (C) 2011-2013 SUSE LINUX Products GmbH, Nuernberg, Germany.
+ * Copyright (C) 2011 Univention GmbH.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -20,7 +22,6 @@
  *     Jim Fehlig <jfehlig@novell.com>
  *     Markus Groß <gross@univention.de>
  */
-/*---------------------------------------------------------------------------*/
 
 #ifndef LIBXL_CONF_H
 # define LIBXL_CONF_H

src/libxl/libxl_driver.c

-/*---------------------------------------------------------------------------*/
-/*  Copyright (C) 2006-2013 Red Hat, Inc.
- *  Copyright (C) 2011-2013 SUSE LINUX Products GmbH, Nuernberg, Germany.
- *  Copyright (C) 2011 Univention GmbH.
+/*
+ * libxl_driver.c: core driver methods for managing libxenlight domains
+ *
+ * Copyright (C) 2006-2013 Red Hat, Inc.
+ * Copyright (C) 2011-2013 SUSE LINUX Products GmbH, Nuernberg, Germany.
+ * Copyright (C) 2011 Univention GmbH.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -22,7 +24,6 @@
  *     Markus Groß <gross@univention.de>
  *     Daniel P. Berrange <berrange@redhat.com>
  */
-/*---------------------------------------------------------------------------*/
 
 #include <config.h>
 

src/libxl/libxl_driver.h

-/*---------------------------------------------------------------------------*/
-/*  Copyright (c) 2011 SUSE LINUX Products GmbH, Nuernberg, Germany.
+/*
+ * libxl_driver.h: core driver methods for managing libxenlight domains
+ *
+ * Copyright (c) 2011-2013 SUSE LINUX Products GmbH, Nuernberg, Germany.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -18,7 +20,6 @@
  * Authors:
  *     Jim Fehlig <jfehlig@novell.com>
  */
-/*---------------------------------------------------------------------------*/
 
 #ifndef LIBXL_DRIVER_H
 # define LIBXL_DRIVER_H