escape: fix return code
core: remove systemd_running_as lookup functions

They are unused and unlikely to ever be.
install: systemd-timesyncd.service is enabled by sysinit.target

systemd-timesyncd.service has a "WantedBy=sysinit.target" so the
initially generated link should match that.
bash-completion: -p option for journalctl
journalctl,man: allow + only between terms

https://bugzilla.redhat.com/show_bug.cgi?id=1110712
Merge https://github.com/Nefelim4ag/systemd