This adds 'consistency' mode flags to the mount command line argument. Initially, the valid 'consistency' flags are 'consistent', 'cached', 'delegated', and 'default'. Signed-off-by: David Sheets <dsheets@docker.com> Signed-off-by: Jeremy Yallop <yallop@docker.com> Upstream-commit: f13297c0beaf4fcc6742a9f3c047cbfeef955ac1 Component: engine