updated Doxyfile

properly close all doxygen groups
fixed remaining doxygen warnings

src/libstrongswan/plugins/md5/md5_hasher.h

@@ -45,4 +45,4 @@ struct md5_hasher_t {
  */
 md5_hasher_t *md5_hasher_create(hash_algorithm_t algo);
 
-#endif /*MD5_HASHER_H_@}*/
+#endif /** MD5_HASHER_H_ @}*/

src/libstrongswan/plugins/md5/md5_plugin.h

@@ -44,4 +44,4 @@ struct md5_plugin_t {
  */
 plugin_t *plugin_create();
 
-#endif /* MD5_PLUGIN_H_ @}*/
+#endif /** MD5_PLUGIN_H_ @}*/