- [ ] Have you signed the [CLA](http://www.ubuntu.com/legal/contributors/)? - [ ] Have you added an entry to the changelog (`docs/reference/changelog.rst`)? ----- Expand the chroot into a sandbox. - enable defining mounts - enable defining diversions - enable defining files to swap in the sandbox - clean dangling processes to be reasonably sure umounting the mountpoints will succeed. Usage example https://github.com/canonical/imagecraft/tree/work/experiment-chroot