fix "move schedule file to processed/"
fix `make sl`
centralize around `make ctst`
call flu_prune_empty_dirs() after a trigger
prune the triggers at once, after shifting them
introduce hlp_count_jsons() helper
bring back tst/var/spool/tdis/.gitkeep
avoid "dash dash word", it's confusing
fix leak in hlp_count_jsons()