uridecoding disallow uriencoded equals in name part

Signed-off-by: Andy Green <andy.green@linaro.org>
diff --git a/lib/private-libwebsockets.h b/lib/private-libwebsockets.h
index 390018a..62a3646 100644
--- a/lib/private-libwebsockets.h
+++ b/lib/private-libwebsockets.h
@@ -810,6 +810,7 @@
 	enum uri_path_states ups;
 	enum uri_esc_states ues;
 	char esc_stash;
+	char post_literal_equal;
 };
 
 struct _lws_websocket_related {