+1621. [func] fdupont
+ Both kea-dhcp4 and kea-dhcp6 now support a special class, 'DROP'.
+ When the class is defined, inbound client packets that match the
+ class's match expression will be dropped without further processing.
+ Each such drop is logged at DEBUG level and accounted for in
+ drop statistics.
+ (Gitlab #606,!375, git bfa5b2c50324e9d2339daa8309774f49a5e7bf3c)
+
1620. [func] franek, razvan
Kea statistics improvements: Support for storing more than one
sample.