analyze: port over to use bus_open_transport()
run: support --system to match other commands, even if redundant
clients: various simplifications
busctl: port over to use bus_open_transport()
inhibit: don't return error code on --help
path-util: paths_check_timestamp() opimizations
clients: unify how we invoke getopt_long()

Among other things this makes sure we always expose a --version command
and show it in the help texts.
socket-proxy: clean-up indenting