Fix doxygen file level comments

src/wps/http_client.h

@@ -1,4 +1,4 @@
-/**
+/*
  * http_client - HTTP client
  * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
  *

src/wps/http_server.h

@@ -1,4 +1,4 @@
-/**
+/*
  * http_server - HTTP server
  * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
  *

src/wps/httpread.h

@@ -1,4 +1,4 @@
-/**
+/*
  * httpread - Manage reading file(s) from HTTP/TCP socket
  * Author: Ted Merrill
  * Copyright 2008 Atheros Communications

src/wps/wps_er.h

@@ -1,3 +1,17 @@
+/*
+ * Wi-Fi Protected Setup - External Registrar
+ * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
 #ifndef WPS_ER_H
 #define WPS_ER_H