Use a single datetime for all filenames across a snapshot#147

orgrim merged 1 commit intoorgrim:masterorgrim/pg_back:masterfrom

stephane-klein:issue-146-proposal-to-define-a-datetime-only-between-all-files-in-a-snapshotstephane-klein/pg_back:issue-146-proposal-to-define-a-datetime-only-between-all-files-in-a-snapshotCopy head branch name to clipboard