Add CHANGES note for [GL #4223]

diff --git a/CHANGES b/CHANGES
index a214ea184db6c6e493eddcf7e4708b088f364902..ce35066732cbeb7dcdf07f05d515abc7429c78c7 100644 (file)
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,6 @@
+6217.  [func]          The dns_badcache unit was refactored to use cds_lfht
+                       instead of hand-crafted locked hashtable. [GL #4223]
+
 6216.  [bug]           Pin dns_request events to the originating loop
                        to serialize access to the data. [GL #4086]