* Add an explicit `select` option to `portage` module
This is a fix for #6226
* Apply suggestions from code review
Co-authored-by: Felix Fontein <felix@fontein.de>
* Default `select` option to None, making it more retrocompatible
* Add changelog fragment for the PR
* Update changelogs/fragments/8236-portage-select-feature.yml
Co-authored-by: Felix Fontein <felix@fontein.de>
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Co-authored-by: Felix Fontein <felix@fontein.de>