pick up latest improvements from common
diff --git a/common b/common
index fd08ec2..3c6caed 160000
--- a/common
+++ b/common
@@ -1 +1 @@
-Subproject commit fd08ec26db49f3639b2bdbde4f977898c7ba48ae
+Subproject commit 3c6caed623736b021d3615df6376ec554640d61e