V3.9.7.1 bugfixes for alpine and opensuse
V3.9.7.1 bugfixes for alpine and opensuse

# 16.03.2018 V3.9.7.1   bugfix alpine images: /etc/shadow entry must be /bin/sh, --dbus-system -with su fails with /bin/bash
# 15.03.2018            bugfix openSUSE: finish(): replace bc with bash-only calculation, bc misses on openSUSE
mviereck/x11docker