Radius: fix initialisation

src/lib/dhcpsrv/radius_host_data_source.cc

@@ -82,13 +82,17 @@ RadiusHostDataSource(const DatabaseConnection::ParameterMap& parameters) {
     if (rh == NULL) {
          isc_throw(isc::Exception, "Failed to initialize Radius client");
     }
+    rh = rc_config_init(rh);
+    if (rh == NULL) {
+         isc_throw(isc::Exception, "Failed to initialize Radius client");
+    }
     res = rc_add_config(rh, "authserver", "127.0.0.1", NULL, 0);
     if (res != 0) {
          isc_throw(isc::Exception, "Failed to initialize Radius client");
     }
     res = rc_add_config(rh, "radius_timeout", "1", NULL, 0);
     res = rc_add_config(rh, "radius_retries", "2", NULL, 0);
-    res = rc_add_config(rh, "serv-type", "tcp", NULL, 0);
+    res = rc_add_config(rh, "serv-type", "udp", NULL, 0);
 }
 
 RadiusHostDataSource::~RadiusHostDataSource() {