modified openhab service file - for startup issues

since last update openhab seemed not to start up, when used with systemd – it starts up and shuts down immediatly-. However it worked when started from a terminal. So a stupid workaround:

yaourt -S tmux

cat /etc/systemd/system/openhab.service

[Unit] Description=OpenHAB runtime 
ExecStart=/usr/bin/tmux new-session -s openHAB -d "/usr/bin/sh ./ -Djava.awt.headless=true" 
ExecStop=/usr/bin/tmux send-keys -t openHAB "logout" Enter #