update

[mdref/mdref.m6w6.name] / mdref

diff --git a/mdref b/mdref
index 80ea76521e2ccbbfac1ac0f33f91af1739ead561..687f5fcb8de9250739a01d5855faa868f593fb73 160000 (submodule)
--- a/mdref
+++ b/mdref
@@ -1 +1 @@
-Subproject commit 80ea76521e2ccbbfac1ac0f33f91af1739ead561
+Subproject commit 687f5fcb8de9250739a01d5855faa868f593fb73