update sp

diff --git a/shibboleth/sp b/shibboleth/sp
index c7caa6c..7d6b6dd 160000 (submodule)
--- a/shibboleth/sp
+++ b/shibboleth/sp
@@ -1 +1 @@
-Subproject commit c7caa6c5650795c99dd9303fdc53e164e9f0a525
+Subproject commit 7d6b6dd7c6100c2d565d51f872261db884bd8e3f