$NetBSD$

Add a header we don't have

--- getnodeaddr.c	2011/12/02 01:42:24	1.1
+++ getnodeaddr.c	2011/12/02 01:42:45
@@ -22,6 +22,9 @@
 #include <errno.h>
 #ifndef _WIN32
 #	include <netdb.h>
+#      ifndef AI_ADDRCONFIG
+#              define AI_ADDRCONFIG  0x20
+#      endif
 #endif
 #include <impl/i18n.h>
 #include <impl/framework.h>
