Added backup-roots-rsync@ unit files.

backup-roots-rsync@.service

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+[Unit]
+Description=Backup root to %I
+
+[Service]
+Type=simple
+Nice=19
+IOSchedulingClass=2
+IOSchedulingPriority=7
+ExecStart=/bin/sh -c '/usr/bin/rsync -HAax // "%I/"'

backup-roots-rsync@.timer

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+[Unit]
+Description=Backup Files
+
+[Timer]
+OnCalendar=07:00:00
+AccuracySec=150s
+Persistent=true
+
+[Install]
+WantedBy=timers.target