update submodules

[mdref/mdref.m6w6.name] / mdref

diff --git a/mdref b/mdref
index 3dbead20601800ab6127df29ecee0227859bdc63..80ea76521e2ccbbfac1ac0f33f91af1739ead561 160000 (submodule)
--- a/mdref
+++ b/mdref
@@ -1 +1 @@
-Subproject commit 3dbead20601800ab6127df29ecee0227859bdc63
+Subproject commit 80ea76521e2ccbbfac1ac0f33f91af1739ead561