update submodules

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

diff --git a/refs/http b/refs/http
index 4a09ec24441c7d918d0a62c60e11616ffa0db744..a765b2f3cf4cd7645731ac8553c3143c7ab7b077 160000 (submodule)
--- a/refs/http
+++ b/refs/http
@@ -1 +1 @@
-Subproject commit 4a09ec24441c7d918d0a62c60e11616ffa0db744
+Subproject commit a765b2f3cf4cd7645731ac8553c3143c7ab7b077

diff --git a/refs/pq b/refs/pq
index ed227d1dd7a45c1e44e896ad9291fa1e12cfab06..37d6a26249ee6ec36c6fbacbde9936f60f9e3bf9 160000 (submodule)
--- a/refs/pq
+++ b/refs/pq
@@ -1 +1 @@
-Subproject commit ed227d1dd7a45c1e44e896ad9291fa1e12cfab06
+Subproject commit 37d6a26249ee6ec36c6fbacbde9936f60f9e3bf9