Request Community Review: Minarca Backup

[leonsk29]

Add Minarca Backup to https://github.com/awesome-foss/awesome-sysadmin#backups (backup software).

https://minarca.org/en_CA

[anonhostpi]

As a member of the wider community, you can edit the README.md and submit a PR.

In case you are asking for others to reviewer the product (cloning comment to applicable issues for tracking):

#368 (comment)

@nodiscc maybe these issues should have more descriptive titles via replacing "Add" with "Request Review:" or more verbosely "Request Community Review?"