updated Doxyfile

properly close all doxygen groups
fixed remaining doxygen warnings

src/libstrongswan/plugins/aes/aes_crypter.h

@@ -47,4 +47,4 @@ struct aes_crypter_t {
 aes_crypter_t *aes_crypter_create(encryption_algorithm_t algo,
 								  size_t key_size);
 
-#endif /* AES_CRYPTER_H_ @}*/
+#endif /** AES_CRYPTER_H_ @}*/

src/libstrongswan/plugins/aes/aes_plugin.h

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