#define SVphv_SHAREKEYS 0x20000000 /* keys live on shared string table */
#define SVphv_LAZYDEL 0x40000000 /* entry in xhv_eiter must be deleted */
+#define SVphv_UTF8KEYS 0x80000000 /* keys when fetched are UTF8 */
#define SVprv_WEAKREF 0x80000000 /* Weak reference */