control-request: use a single generic control cmd for UnitActiveState
control-response-util: add send_shutdownd() for communicating with the systemd-shutdownd control socket
control-request: add preliminary root checks for system commands
control-request: do send_shutdownd() and utmp_put_shutdown() on system commands
control-response-util: don't do unit file operations if in chroot
control-request: add default
control-request: add rescue
control-request: add emergency
control-request: add suspend
manager: make manager_start_target() a publicly accessible function
control-request: add suspend
control-request: add hibernate
control-request: add hybrid-sleep
initctl: change runlevel without invoking the bus
control-request: fix typo in hybsleep cmd