Clean up zoneinfo when freeing the entry.  This makes more sense, since we will always want to do this anyway, and less code duplication means less places to forget to do it.
Clean up zoneinfo when freeing the entry.  This makes more sense, since
we will always want to do this anyway, and less code duplication means less
places to forget to do it.

each/bind9-collab,each/bind9-collab,pecharmin/bind9,pecharmin/bind9,each/bind9-collab,pecharmin/bind9,each/bind9-collab,each/bind9-collab,pecharmin/bind9,each/bind9-collab,pecharmin/bind9,pecharmin/bind9