* autoload.cc (GetExtendedTcpTable): Define.

* fhandler_socket.cc (address_in_use): Take const struct sockaddr
	pointer as argument.  Implement additional AF_INET6 table check.
	(fhandler_socket::bind): Drop AF_INET test before calling
	address_in_use.
	* net.cc (ipv4_getnameinfo): Return EAI_FAMILY instead of 1 if
	called with unsupported af_family.

winsup/cygwin/net.cc

@@ -3765,7 +3765,7 @@ ipv4_getnameinfo (const struct sockaddr *sa, socklen_t salen,
 #endif
 
     default:
-      return (1);
+      return (EAI_FAMILY);
     }
 }