V3.9.0 new options --openrc (init system) and --dbusdaemon

# 15.12.2017 V3.9.0     /etc/shadow: disable possible root password
#                       --dbusdaemon: new option to run dbus system daemon and consolekit in container
# 14.12.2017            re-checked capabilities for init systems
#                       --systemd: set environment globally, especially DISPLAY for deepin is needed
#                       --systemd: set xhost+SI:localuser:$Benutzer as XAUTHORITY seems to be ignored
# 12.12.2017            /tmp/.ICE-unix created in dockerrc, root owned with 1777, needed for SESSION_MANAGER
#                       --rw: deprecated, root file system is always r/w now due to 'docker exec' in dockerrc
# 10.12.2017 (V3.8.1)   bugfix Ubuntu: avoid Wayland backend for Weston due to MIR issue #19
#            (V3.8.1)   --xorg: change Xorg to X. X is setuid wrapper for Xorg on Ubuntu 14.04
#            (V3.8.1)   +iglx removed from X options, not present in older versions of X, and maybe security issue.
# 09.12.2017            create user in dockerrc with 'docker exec' instead of using createuser.sh
#                       --xorg: removed +iglx from options, not supported on older X versions
# 07.12.2017            --openrc: new option for init system OpenRC in container
#                       --sharecgroup: new option to share /sys/fs/cgroup. default for --systemd.
# 06.12.2017            create /var/lib/dbus in dockerrc to avoid dbus errors with init systems
#                       show image name and display in weston windows
#                       bugfix --runit: add SYS_BOOT even with --cap-default