tools - Implement a simple hammer-backup script.
This script operates HAMMER PFSes and dumps its contents for backup
purposes.
It uses mirror-read directive (see 'man 8 hammer') to perform a
dump to stdout that is redirected to a file with or without
compression.
Read /usr/src/tools/tools/hammer-backup/README for more detailed
information.
Also please note the script is not installed with a default DragonFly
BSD installation, so you have to take care of that manually.
Any suggestion or bug report is appreciated!