win32: Update to OpenSSL 1.1

src/common/server.c

@@ -772,7 +772,7 @@ server_connect_success (server *serv)
 
 		/* it'll be a memory leak, if connection isn't terminated by
 		   server_cleanup() */
-		if ((err = _SSL_set_verify (serv->ctx, ssl_cb_verify, NULL)))
+		if ((err = _SSL_set_verify (serv->ctx, ssl_cb_verify)))
 		{
 			EMIT_SIGNAL (XP_TE_CONNFAIL, serv->server_session, err, NULL,
 							 NULL, NULL, 0);