Update freeradius spec

diff --git a/freeradius-server b/freeradius-server
index 22505f9..815f3d4 160000 (submodule)
--- a/freeradius-server
+++ b/freeradius-server
@@ -1 +1 @@
-Subproject commit 22505f9498e530087840f4259afef50c2e6adf1e
+Subproject commit 815f3d4e4d44acf1e1d7880f8185cd2e2632bbd5