* nss_nisplus: When using parser form nss_files, rewrite parser
 
 * compat could use data from nisplus, too. Implement this

 * nis_server: implement nis_getservlist, nis_stats, nis_servstate

 * nis_groups: implement it

 * nis_ping: implement it

 * __start_clock(), __stop_clock(): Test the interface and
                                    implement it
 
 * What does nis_list give back, if rpc.nisd is not running or
   if /var/nis/NIS_START_FILE does not exist ?

 * nis_table.c: nis_list(): 
	Missing flags: FOLLOW_PATH, ALL_RESULTS
	callback: Don't simulate it, use server callback thread

 * Possible flags:
	- FOLLOW_LINKS	(nis_list, nis_lookup)
	- FOLLOW_PATH	(nis_list, not supported)
	- HARD_LOOKUP	(__do_niscall, not supported)
	- ALL_RESULTS	(nis_list, not supported, needs server callback)
	- NO_CACHE	(__do_niscall, cache not supported yet)
	- MASTER_ONLY	(__do_niscall, not supported)
	- EXPAND_NAME	(nis_lookup, nis_list)
	- RETURN_RESULT (nis_table.c)
	- ADD_OVERWRITE	(nis_table.c)
	- REM_MULTIPLE	(nis_table.c)
	- MOD_SAMEOBJ 	(nis_table.c)
	- ADD_RESERVED	(nis_table.c)
	- REM_RESERVED	(nis_table.c)
	- MOD_EXCLUSIVE	(nis_table.c)
	- USE_DGRAM	(__do_niscall)
	- NO_AUTHINFO 	(__do_niscall)