NDBC support __interval to call at interval
add NDBC message demo plsql unit, msg_b
add NDBC refresh cache data src for demo
bugfix pv.ph_parts use varchar2 array over nvar...
output refactor out switch and make public
not check h.header, so mp can set header freely
add direct print msg using normal API
add sync_sendout using normal print API demo
move to v0.9.2, support print to callout message