winsock: Implement getnameinfo.
diff --git a/configure.ac b/configure.ac
index 8fc5519..652de1a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1156,6 +1156,7 @@
 	futimes \
 	futimesat \
 	getaddrinfo \
+	getnameinfo \
 	getnetbyname \
 	getopt_long \
 	getpagesize \