* Add support for ZSH / TMUX / oh-my-zsh
* Selecting default shell at 1st run
* Install ZSH by default except on minimal image
* Lets rather create armbian-zsh package
* - fix remaining ZSH problems
- add systemd timer to remove default desktop autologin feature
- change DESKTOP_AUTOLOGIN to disabled by default
* Few small improvements
* Oneliner for revering all users back to BASH if package is uninstalled
* Properly escape variables
* Fixing chmod
* More cryptic awk magic to fix permissions for all normal users that are getting zsh magic
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