Separating interface and implementation of FIB. Right now everything is
kind of broken.
diff --git a/utils/random-policy.h b/utils/random-policy.h
index 705bcf3..7a96712 100644
--- a/utils/random-policy.h
+++ b/utils/random-policy.h
@@ -127,6 +127,12 @@
       }
 
       inline void
+      clear ()
+      {
+        policy_container::clear ();
+      }
+
+      inline void
       set_max_size (size_t max_size)
       {
         max_size_ = max_size;