A couple more safety valves and cosmetics.
Let it write out /etc/issue into the container to guide the user a little.
few more /etc/issue changes
The containers now receive /etc/lxc-containervars.sh written to it, which contains all container variables that provision.sh can utilize, which simplifies provision.sh. Also, the username and homedir are now taken from the owner of the cloned GIT lxc-containers/ directory, so that needs always to be cloned in your home.