Update freeradius to an actual 3.0.4 postrelease for centos

diff --git a/freeradius-server b/freeradius-server
index f2c5f99..b7a765f 160000 (submodule)
--- a/freeradius-server
+++ b/freeradius-server
@@ -1 +1 @@
-Subproject commit f2c5f99e09350a7bf65b995c49b1af9371390fdf
+Subproject commit b7a765fc2b41e21778ee2722860d9b6c2cfb0f25