[pim] More RPF cache refresh statistics
diff --git a/pimd/pim_zebra.c b/pimd/pim_zebra.c
index 9764532..3530434 100644
--- a/pimd/pim_zebra.c
+++ b/pimd/pim_zebra.c
@@ -447,6 +447,7 @@
   /* update kernel multicast forwarding cache (MFC) */
   scan_oil();
 
+  qpim_rpf_cache_refresh_last = pim_time_monotonic_sec();
   ++qpim_rpf_cache_refresh_events;
 
   return 0;