Use 2.4RC1 tags for Shibboleth

diff --git a/shibboleth/opensaml2 b/shibboleth/opensaml2
index 4fd67fc..4bc248e 160000 (submodule)
--- a/shibboleth/opensaml2
+++ b/shibboleth/opensaml2
@@ -1 +1 @@
-Subproject commit 4fd67fc08a6e1773419f51f7f58904cc013e0124
+Subproject commit 4bc248e6a38e0c1c23dee3e2dec278ceebd0abfa

diff --git a/shibboleth/sp b/shibboleth/sp
index f10cb35..a0af8ed 160000 (submodule)
--- a/shibboleth/sp
+++ b/shibboleth/sp
@@ -1 +1 @@
-Subproject commit f10cb3582dcc80c593198a27ab48db583327d7de
+Subproject commit a0af8ed86ab481af4605daf5cf837fdaa4544bdd

diff --git a/shibboleth/xmltooling b/shibboleth/xmltooling
index fbf40fe..d6f3ea4 160000 (submodule)
--- a/shibboleth/xmltooling
+++ b/shibboleth/xmltooling
@@ -1 +1 @@
-Subproject commit fbf40fe5dba573334df067d95b6f18b68d8f70b8
+Subproject commit d6f3ea49b1e7e0cf45aae409f9630999e0263df9