update unbound from upstream

external/unbound/util/winsock_event.h

@@ -90,6 +90,21 @@
 #define HAVE_EVENT_BASE_FREE
 #endif
 
+/* redefine the calls to different names so that there is no name
+ * collision with other code that uses libevent names. (that uses libunbound)*/
+#define event_init winsockevent_init
+#define event_get_version winsockevent_get_version
+#define event_get_method winsockevent_get_method
+#define event_base_dispatch winsockevent_base_dispatch
+#define event_base_loopexit winsockevent_base_loopexit
+#define event_base_free winsockevent_base_free
+#define event_set winsockevent_set
+#define event_base_set winsockevent_base_set
+#define event_add winsockevent_add
+#define event_del winsockevent_del
+#define signal_add winsocksignal_add
+#define signal_del winsocksignal_del
+
 /** event timeout */
 #define EV_TIMEOUT      0x01
 /** event fd readable */