freevxfs: update documentation and cresdits for HP-UX support

Signed-off-by: Krzysztof Błaszkowski <kb@sysmikro.com.pl>
[hch: cosmetic updates]
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/freevxfs/vxfs.h b/fs/freevxfs/vxfs.h
index f52f259..a41ea0b 100644
--- a/fs/freevxfs/vxfs.h
+++ b/fs/freevxfs/vxfs.h
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2000-2001 Christoph Hellwig.
+ * Copyright (c) 2016 Krzysztof Blaszkowski
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without