Support integration of Piwik/Matomo in KorAP

Change-Id: I0c67971e67fe83b5c6d8d3dc584fed23c989728b
diff --git a/lib/Kalamar.pm b/lib/Kalamar.pm
index 7eec66c..572f006 100644
--- a/lib/Kalamar.pm
+++ b/lib/Kalamar.pm
@@ -129,7 +129,8 @@
     'KalamarHelpers',            # Specific Helpers for Kalamar
     'KalamarUser',               # Specific Helpers for Kalamar
     'ClientIP',                  # Get client IP from X-Forwarded-For
-    'ClosedRedirect'             # Redirect with OpenRedirect protection
+    'ClosedRedirect',            # Redirect with OpenRedirect protection
+    'Piwik'                      # Integrate Piwik/Matomo Analytics
   ) {
     $self->plugin($_);
   };