Use new HAVE_SOCKADDR_SIN_LEN define (replaces HAVE_SOCKADDR_LEN).

clientname.c

@@ -195,7 +195,7 @@ void client_sockaddr(int fd,
 		memset(sin, 0, sizeof(*sin));
 		sin->sin_family = AF_INET;
 		*ss_len = sizeof(struct sockaddr_in);
-#ifdef HAVE_SOCKADDR_LEN
+#if HAVE_SOCKADDR_SIN_LEN
 		sin->sin_len = *ss_len;
 #endif
 		sin->sin_port = sin6.sin6_port;

socket.c

@@ -698,7 +698,7 @@ static int socketpair_tcp(int fd[2])
 		goto failed;
 
 	memset(&sock2, 0, sizeof sock2);
-#ifdef HAVE_SOCKADDR_LEN
+#if HAVE_SOCKADDR_SIN_LEN
 	sock2.sin_len = sizeof sock2;
 #endif
 	sock2.sin_family = PF_INET;