--- /dev/null
+>=1
+--
+ * skipping of normal, non-unified files
+ * general progress-messages
+
+>=2
+---
+ * deunify/unify messages
+ * skip-reason
+ * more detailed progress-messages
+
+>=3
+--
+ * skipping of already unified files
+
+>=4
+--
+ * source of unification; when verbosity==4 -> vserver-id, else
+ physical path
+
+>=6
+---
+ * skipping of dirs and dotfiles