systemd-journald: Fix journal file descriptors leak problems.
systemd: Activation service must be restarted when it is already started and re-actived by dbus
systemd-core: fix problem of dbus service can not be started
systemd-core: Delay to restart when a service can not be auto-restarted when there is one STOP_JOB for the service
core: fix SIGABRT on empty exec command argv
journalctl: never fail at flushing when the flushed flag is set
timesync: fix wrong type for receiving timestamp in nanoseconds
udev: fix potential memleak
(cherry picked from commit d0907552a565ed01a4f9da4dd27168b3726f9236)
