gateway add cfg/slot params
gateway out of sync go conn, call close conn first
if sync is not read ok, can try again in a while
session.module use to Noradle-cfg#slot

used to avoid start repeatly cfg#slot server
use pipe(name as module) to send quit signal

call kill(cfg,slot) to graceful kill noradle servers,
cfg is null to kill all server process,
cfg has value, slot is null to kill all server process for one cfg
update k_cfg.server_control

* adapt standby db usage
* make get of server_control_t%rowtype simpler
* readonly db check cfg change at idle timeouts only
add noradle server launcher