Rsync handler services support is obsolete
The rsync handler supports stopping and starting services during the backup operation, but this functionality only supports initscript-style services. Since many major distributions have migrated to systemd, we might need to consider updating or sunsetting this part of the handler code.
https://0xacab.org/riseuplabs/backupninja/-/blob/master/handlers/rsync.in#L982-10040