Add app-backup/backupchecker the successor of app-backup/brebis
(Portage version: 2.2.20/hg/Linux x86_64, signed Manifest commit with key )
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<!-- <herd>some-herd</herd> -->
<maintainer>
<email>da_risk@geekorum.com</email>
</maintainer>
</pkgmetadata>