Include <arpa/nameser.h> before <resolv.h>.

diff --git a/configure b/configure
index edeae83..118ff41 100755
--- a/configure
+++ b/configure
@@ -14014,6 +14014,9 @@
      #if HAVE_NETINET_IN_H
      # include <netinet/in.h>
      #endif
+     #if HAVE_ARPA_NAMESER_H
+     # include <arpa/nameser.h>
+     #endif
 
 #include <$ac_header>
 _ACEOF