Update

diff --git a/plug b/plug
index b4d9c31751bff07e74ef9f353a276a8d2375d0e1..2377a71db5f6a711ee2eedbd074f013863694ec8 160000 (submodule)
--- a/plug
+++ b/plug
@@ -1 +1 @@
-Subproject commit b4d9c31751bff07e74ef9f353a276a8d2375d0e1
+Subproject commit 2377a71db5f6a711ee2eedbd074f013863694ec8