Update submodules: util (new commits)

util:
    b23cd03 Shane Mc Cormack <shane@dmdirc.com>
            Update copyright for 2013

            Gerrit: http://gerrit.dmdirc.com/2606

Change-Id: I2b022ec415d0a63c159a664a4d3f424b5df18152

modules/util

@@ -1 +1 @@
-Subproject commit 716e4f22e6d37cc3a931b08916ee00fbee7c4401
+Subproject commit b23cd03717294cd3f82cf79e6bd26e892d4d4352