Merge upstream changes.

Implement forward-compatible self-management system.

Implement forward-compatible self-management system.

Merge branch 'master' of github-0xford:0xFORDCOMMA/guestctl

Abandon volume-based persistence now that image commit is first-class.

Implement guest connect functionality.

Implement snapshot view and rollback functionality.

Implement commit and revuild functionality.

Implement standalone commit operation.

Fix password templating issue.

Fix typo in manage-prompt comment.

Clarify transparent-run printing reasoning.

Fix incorrect dockerfile template.

Initial commit because I make questionable version-control choices.