Since 1166f4472d the API bus setup
and the subscriber coldplug happen only once the asynchronous GetId
reply is processed by the event loop. After a daemon-reexec,
manager_dispatch_dbus_queue() runs before subscribers were registered
and consumed send_reloading_done, so the one-shot Reloading(false)
signal was never sent.
Clients that wait for this signal to detect that a reexec finished time out.
Track the pending setup and hold the flag until the reply handler has
re-added the subscriptions.
Also affects v261.2 via backport 26f3717e27f6f08347adf851c605d5fe1f52ac57.
Yu Watanabe
08ca33fdde