- Updated Doxygen documentation generation and documentation on small parts

diff --git a/include/polarssl/sha4.h b/include/polarssl/sha4.h
index ebf2d45..5f980b9 100644
--- a/include/polarssl/sha4.h
+++ b/include/polarssl/sha4.h
@@ -1,7 +1,7 @@
 /**
  * \file sha4.h
  *
- * \brief SHA-384/512 cryptographic hash function
+ * \brief SHA-384 and SHA-512 cryptographic hash function
  *
  *  Copyright (C) 2006-2010, Brainspark B.V.
  *