Add link to upstream tracker.

diff --git a/docs/doxygen_index b/docs/doxygen_index
index b574275..3bca941 100644 (file)
--- a/docs/doxygen_index
+++ b/docs/doxygen_index
@@ -3,6 +3,8 @@
  *
  * The documentation covers public parts of cryptsetup API. In the following sections you'll find
  * the examples that describe some features of cryptsetup API.
+ * For more info about libcryptsetup API versions see
+ * <a href="http://upstream-tracker.org/versions/libcryptsetup.html">Upstream Tracker</a>.
  *
  * <OL type="A">
  *     <LI>@ref cexamples "Cryptsetup API examples"</LI>