add _res (__res_state()) dummy

src/network/res_state.c

@@ -0,0 +1,9 @@
+#include <resolv.h>
+
+/* This is completely unused, and exists purely to satisfy broken apps. */
+
+struct __res_state *__res_state()
+{
+	static struct __res_state res;
+	return &res;
+}