Refactor v1alpha2 Linux namespace definitions #826
Merged
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There are a handful of Linux namespaces (see https://man7.org/linux/man-pages/man7/namespaces.7.html). Containers can be configured to run inside the bounds of precreated namespaces. The original v1alpha2 API allowed users to specify a network namespace only, but we have already acquired a use-case for the PID namespace.
This change refactors the v1alpha2 API (unreleased) to accommodate future namespace customization.