Dar-backup

new option to cleanup.sh
- alternate-archive-dir allows to clean up old dar archives on for example a mounted usbdisk

SHA256:
61d1bbb1a9a7abf6ab5e221a2b4a65b498fed133866e89d1e7fc97f8f386dcc6 dar-backup-linux-v1.4.0.tar.gz

Switched to semantic versioning, no dramatic changes

New functionality:
- a cleanup script to remove old (configurable) DIFF & INC archives. FULL archives are never touched
- cleanup systemd timer and service provided (not automatically installed)
- par2 integration refactored, logging improved, docs improved
- install instructions simplified
- alerts for upcoming FULL and DIFF backups sent
- minor improvements to logging in general

Improved logging on restore test:

- log if there are no files backed up
- log if all files' sizes > 10000000 (this makes the script bypass them and thus no restore test is performed)

SHA256:
b4d2ca3b339f654726b182d2c0a3336be5cc12079131f76a300729bb01d5d521 dar-backup-linux-v1.0.12.tar.gz

new feature + systemd service fix

- on backups, now report number of saved files and number of files gone missing
- use correct systemd service option to allow long running backup jobs

SHA256:
215018c254b0450dc936aaec68acb1a3765aca807a4c274282d9d17feabd5095 dar-backup-linux-v1.0.11.tar.gz

maintenance version - no new features.

- configure --comparison-field=ignore-owner for the restore test, which is very useful when non-privileged users use dar in newer versions

SHA256:
36aeb1f09f26a75968a492644741d559c9edcff0f79a69ef1847ba0b6678252d dar-backup-linux-v1.0.10.tar.gz

- Added --fsa-scope-none option
to suppress restore errors when restoring files with attributes not supported by the file system restored to. Prove it with test-fsa-none.sh test case.

- Added test cases to prove par2 repair capability
repair successful, when file damage is under 5%

- par2 less verbose while creating it's files

- test case counting restored files now specific for FULL, DIFF and INC

- documentation improvements