pmbootstrap hardcoded location of $XDG_CONFIG_HOME
Currently pmbootstrap hardcodes location of $XDG_CONFIG_HOME in at least two places (pmb/config/__init__.py and helpers/envkernel.sh). However, this might conflict or not work with some non-standard setups where $XDG_CONFIG_HOME is not $HOME/.config
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@PureTryOut says that we should use pyxdg library for handing $XDG_CONFIG_HOME.