appbackup_%s_%s-v%s.tar.gz -> app_%s_%s_v%s.tar.gz
drop 'backup'. rationale: it is known these files are backups
timestamp has '-'. rationale: colon in filename confuses tools like scp (they think it is a hostname)
backup_%s-v%s.tar.gz -> box_%s_v%s.tar.gz
drop 'backup' and name it 'box'. this makes it clear it related to the box backup
timestamp has '-'. rationale: colon in filename confuses tools like scp (they think it is a hostname)
Part of #159
2b27e554fd