v2.14: convert max_connect_failures to integer
v2.14: blf update on logout, kill agent call if member hangs up early
v2.14: fix most recent statuses fetch
v2.14: fix the tracking of agent call ids/ctrl queues, and fix the props:delete/2 (with unit test)
KAZOO-1039: update logging
KAZOO-1039: handle reset flushing
KAZOO-1039: find subs for flushing