[DOC] update ROADMAP file
diff --git a/ROADMAP b/ROADMAP
index d28260c..1c289d1 100644
--- a/ROADMAP
+++ b/ROADMAP
@@ -3,6 +3,10 @@
 Legend: '+' = done, '-' = todo, '*' = done except doc
 
 1.5 (ETA 2010/12/31) :
+  - count number of monitor requests on frontends, that's the only way
+    to explain the possible huge difference between frontend and backend
+    sessions.
+
   - ACL to report number of used entries in a table
 
   - server-side HTTP keepalive