This adds the `--live-restore` option to the documentation. Also synched usage description in the documentation with the actual description, and re-phrased some flag descriptions to be a bit more consistent. Signed-off-by: Sebastiaan van Stijn <github@gone.nl> Upstream-commit: 64a8317a5a306dffd0ec080d9ec5b4ceb2479a01 Component: engine