Check systemd service using LoadState (bnc#860083)

A list-units shows the effective services names without
services aliases like network.service or syslog.service.
handle targets in /sbin/service as well

also display status of services that are part of the target. Useful for
e.g openvpn.
Enable service script to reload systemd if required

Signed-off-by: Werner Fink <werner@suse.de>
implement legacy actions (bnc#861124)
Enable service script to return LSB status exit values (bnc#880103)

Signed-off-by: Werner Fink <werner@suse.de>
always pass --full to systemctl (bnc#882918)

systemctl may give a hint to pass -l to avoid shortening output which is
not supported by /usr/sbin/service
update service man page
remove no longer supported sysconfig settings (bnc#721682)