client connect: oom4 clean up timeout list

https://github.com/warmcat/libwebsockets/issues/810
diff --git a/lib/private-libwebsockets.h b/lib/private-libwebsockets.h
index a2abb2b..d10d906 100644
--- a/lib/private-libwebsockets.h
+++ b/lib/private-libwebsockets.h
@@ -1612,6 +1612,9 @@
 LWS_EXTERN int LWS_WARN_UNUSED_RESULT
 lws_service_timeout_check(struct lws *wsi, unsigned int sec);
 
+LWS_EXTERN void
+lws_remove_from_timeout_list(struct lws *wsi);
+
 LWS_EXTERN struct lws * LWS_WARN_UNUSED_RESULT
 lws_client_connect_2(struct lws *wsi);