Add 'dar' to 'Backups' (#457)

Co-authored-by: nodiscc <nodiscc@gmail.com>

README.md

@@ -107,6 +107,7 @@
 - [BorgBackup](https://github.com/borgbackup/borg) - A fork of [Attic](https://attic-backup.org) deduplicating backup program written in Python.
 - [Burp](http://burp.grke.org/) - Network backup and restore program.
 - [DREBS](https://github.com/dojo4/drebs) - AWS EBS backup script that supports strategies.
+- [Dar](http://dar.linux.free.fr/) - Which stands for Disk ARchive, is a robust and rich featured archiving and backup software of the tar style. ([Source Code](https://github.com/Edrusb/DAR)) `GPL-2.0` `C++`
 - [Duplicati](http://www.duplicati.com) - Multiple backends, encryption, web-ui and multi-OS backup tool.
 - [Duplicity](http://duplicity.nongnu.org/) - Encrypted bandwidth-efficient backup using the rsync algorithm.
 - [Elkarbackup](https://github.com/elkarbackup/elkarbackup) - Backup solution based on RSnapshot with a simple web interface