V1.2.1 Xdummy instead of Xvfb, bugfix pulseaudio, VirtualGL improved
V1.2.1 Xdummy instead of Xvfb, bugfix pulseaudio, VirtualGL improved

# 13.10.2016 V1.2.1   some improvements using VirtualGL
#                     don't unload pulseaudio tcp module on exit to avoid pulseaudio daemon stop
#                     Xdummy instead of Xvfb for xpra - dependency xvfb lost
mviereck/x11docker