updated Doxyfile

properly close all doxygen groups
fixed remaining doxygen warnings

src/charon/kernel/kernel_interface.h

@@ -379,4 +379,4 @@ struct kernel_interface_t {
  */
 kernel_interface_t *kernel_interface_create(void);
 
-#endif /* KERNEL_INTERFACE_H_ @} */
+#endif /** KERNEL_INTERFACE_H_ @}*/

src/charon/kernel/kernel_ipsec.h

@@ -258,4 +258,4 @@ struct kernel_ipsec_t {
 	void (*destroy) (kernel_ipsec_t *this);
 };
 
-#endif /* KERNEL_IPSEC_H_ @} */
+#endif /** KERNEL_IPSEC_H_ @}*/

src/charon/kernel/kernel_net.h

@@ -142,4 +142,4 @@ struct kernel_net_t {
 	void (*destroy) (kernel_net_t *this);
 };
 
-#endif /* KERNEL_NET_H_ @} */
+#endif /** KERNEL_NET_H_ @}*/